Best Free Project Management Tools 2026 — Kanban, Gantt & Task Tracking

Manage projects for free with the best online task trackers, kanban boards, and Gantt chart tools. Compare features, limits, and which is best for your team size.

productivitycollaboration

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regex15. 5. 2026·8 min čtení

Regex Cheat Sheet 2026 — Regular Expressions Made Simple

The ultimate regex cheat sheet with examples for email validation, URL matching, phone numbers, and more. Test your patterns with our free online regex tester.

developer-toolsprogrammingjavascriptweb-development

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css13. 5. 2026·15 min čtení

HEX to RGB Converter — Color Code Guide for Web Developers

Convert HEX to RGB, HSL, and CMYK color codes instantly. Learn how color systems work in CSS and design with practical examples and a free online converter.

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image12. 5. 2026·17 min čtení

How to Compress Images Without Losing Quality: The Complete 2026 Guide

Image compression isn't just about making files smaller. It's about finding the sweet spot where file size drops 80% but your eyes can't tell the difference.

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developer-tools11. 5. 2026·11 min čtení

Free JSON Formatter, Validator & Beautifier: The Developer's Essential Tool

Format, validate, and beautify JSON instantly in your browser. Syntax highlighting, error detection, tree view, and more — completely free, no data leaves your device.

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api11. 5. 2026·17 min čtení

500+ Free Public APIs for Your Next Project — The Definitive List (2026)

Browse 500+ free public APIs organized by category — weather, finance, AI, maps, music, and more. Find the perfect API for your next app or side project.

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typescript9. 5. 2026·24 min čtení

TypeScript Compiler API: Building Custom Linters, Codemods, and Type Analyzers

A practical guide to the TypeScript Compiler API. Build custom linters that leverage type information ESLint cannot access, write codemods that understand your type system, and create IDE-like tooling using the Language Service API.

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photo-editing7. 5. 2026·14 min čtení

Free Photo Editing in 2026: You Don't Need Photoshop Anymore

Browser-based photo editors now have layers, masks, AI background removal, and GPU acceleration. Here's why I cancelled my Photoshop subscription.

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games6. 5. 2026·22 min čtení

50 Best Free Online Games You Can Play Right Now: No Download, No Signup, No Ads

Bored at work? Waiting for a flight? Here are 50 free browser games you can play instantly — puzzles, arcade, strategy, word games — no download, no account, no ads.

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developer-tools5. 5. 2026·16 min čtení

The Best Free Online Code Editors in 2026: Write Code Anywhere

Modern browser-based code editors support 50+ languages, Vim keybindings, themes, and real terminal access. Here's what actually works for real development.

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text-tools3. 5. 2026·10 min čtení

Free Text Tools Every Writer and Content Creator Needs

Discover 53+ free text tools for writers and content creators. Word counters, case converters, text formatters, lorem ipsum generators, and more.

writingcontent-creationfree-tools

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image-tools2. 5. 2026·11 min čtení

Convert Images Online Free: PNG, JPG, WebP, SVG and More

Convert images between PNG, JPG, WebP, SVG, GIF and more formats for free. No upload needed — all conversions happen in your browser for maximum privacy.

converterfree-toolsweb-development

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resume2. 5. 2026·12 min čtení

How to Build a Professional Resume for Free in 2026

Create a professional resume for free with expert tips on formatting, content, ATS optimization, and common mistakes to avoid. No signup or templates needed.

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html29. 4. 2026·9 min čtení

How to Convert HTML to PDF for Free: Methods and Tools

Learn how to convert HTML pages to PDF for free. Compare browser methods, online tools, and programmatic approaches for perfect HTML-to-PDF conversion.

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code-editor29. 4. 2026·11 min čtení

Free Online Code Editor: Write and Run Code in 53+ Runtimes

Write, run, and share code in 53+ runtimes with a free online IDE. Features syntax highlighting, 10 themes, Vim mode, and instant execution.

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developer-tools27. 4. 2026·15 min čtení

Best Free Online Code Formatters and Beautifiers in 2026: JSON, SQL, HTML, CSS, and More

Messy code? Paste it in, get it formatted. Free browser-based code formatters for JSON, SQL, HTML, CSS, JavaScript, Python, XML, and 50+ languages — no IDE needed.

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web-performance27. 4. 2026·24 min čtení

How to Test Your Website Speed for Free in 2026: Tools, Metrics, and Fixes

Slow websites lose visitors and rankings. Here's how to test your site's speed for free, understand Core Web Vitals, and fix the most common performance killers.

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downdetector25. 4. 2026·17 min čtení

Is It Down Right Now? How to Check If a Website Is Down

Find out if a website is down for everyone or just you. Learn how to check server status, diagnose outages, and get real-time downtime alerts for 1700+ services.

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brain-games23. 4. 2026·12 min čtení

Best Free Brain Training Games to Sharpen Your Mind in 2026

Boost your cognitive skills with free brain training games. Play puzzles, strategy games, word games, and memory challenges directly in your browser.

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developer-tools22. 4. 2026·21 min čtení

Free API Testing Tools in 2026: Why You Don't Need Postman Premium

Postman went from free to $14/month. Here are the browser-based API testing tools that do everything you need — request building, auth, environments, and history.

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apis20. 4. 2026·11 min čtení

500+ Free Public APIs for Your Next Project in 2026

Browse 500+ free public APIs organized by category. Find the perfect API for your next project — from weather and news to AI and finance.

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tools19. 4. 2026·15 min čtení

Best Free CSS Animation & Gradient Generator Tools 2026 — No Coding Needed

Generate CSS animations, gradients, shadows, and transitions visually — no manual coding required. Copy clean CSS code and paste into your projects.

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multiplayer19. 4. 2026·11 min čtení

Best Free Multiplayer Browser Games to Play with Friends

Discover the best free multiplayer browser games you can play with friends. Real-time board games, strategy games, and even a 3D FPS — no downloads needed.

gamesbrowser-games2026

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tools17. 4. 2026·13 min čtení

Translate Documents & PDFs Free Online 2026 — Keep Formatting Intact

Translate documents, PDFs, and files online for free while keeping the original formatting. Compare the best free document translation tools and their accuracy.

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internet15. 4. 2026·22 min čtení

How to Test Your Internet Speed (And What the Numbers Actually Mean)

Download speed, upload speed, ping, jitter — most people don't know what these numbers mean or what 'good' looks like. Here's the plain-English explanation.

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developer-tools15. 4. 2026·15 min čtení

Regex Made Simple: A Practical Guide With an Online Tester

Regular expressions don't have to be cryptic. Here's a practical guide with real-world patterns for emails, URLs, dates, and more — plus how to test them instantly.

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strategy-games13. 4. 2026·12 min čtení

Best Free Online Chess, Sudoku & Strategy Games: Train Your Brain

Play chess against a grandmaster-level AI, solve unlimited Sudoku puzzles, and challenge your mind with strategy games — all free in your browser.

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data-visualization12. 4. 2026·30 min čtení

How to Make Charts and Graphs Online for Free: The Complete 2026 Guide

Bar charts, pie charts, line graphs, scatter plots — create beautiful data visualizations for free in your browser. Export to PNG, SVG, or embed anywhere.

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security11. 4. 2026·25 min čtení

How to Generate Strong Passwords in 2026: The Complete Security Guide

123456 is still the most common password. Here's how to generate truly unbreakable passwords, check if yours have been leaked, and manage them without losing your mind.

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design9. 4. 2026·15 min čtení

Best Free Icon Libraries & SVG Icon Sets 2026 — Download & Use Anywhere

Discover the best free icon libraries with thousands of SVG icons for websites, apps, and design projects. Compare licenses, styles, and how to use them.

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pdf8. 4. 2026·17 min čtení

Free PDF Tools That Actually Work: The No-BS Guide

Most free PDF tools are ad-infested or upload your files to sketchy servers. Here's how to find ones that process everything locally in your browser.

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privacy6. 4. 2026·17 min čtení

Your Browser Is the Most Private Tool You Own (If You Use It Right)

Your browser can encrypt, hash, convert, and process files without sending a single byte to any server. Here's how to use it as your privacy-first toolkit.

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developer-tools6. 4. 2026·21 min čtení

JSON Formatter and Validator: The Developer Tool You Use Every Single Day

If you work with APIs, you format JSON daily. Here's why browser-based formatters beat CLI tools for quick validation — and the features that actually matter.

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base644. 4. 2026·12 min čtení

Base64 Encode and Decode — What It Is and How to Use It

Understand Base64 encoding and decoding with practical examples. Learn when to use it, how it works under the hood, and encode/decode strings online for free.

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jwt3. 4. 2026·11 min čtení

JWT Tokens Explained: What They Are and How to Decode Them

Understand JSON Web Tokens (JWT) — how they work, their structure, common use cases, security best practices, and how to decode them with free online tools.

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seo1. 4. 2026·11 min čtení

How to Analyze Your Website SEO, Performance and Security

Learn how to audit your website's SEO, performance, security, and accessibility. Use free tools to identify issues and improve your site's ranking and speed.

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social-media30. 3. 2026·26 min čtení

Best Free Meme Makers Online in 2026: Create Viral Memes Without Watermarks

Make memes in seconds — custom templates, text overlay, GIF memes, no watermark, no signup. The best free browser-based meme generators for social media.

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database30. 3. 2026·26 min čtení

Database Migrations That Won't Destroy Your Weekend: Zero-Downtime Schema Changes

The hard-won lessons from years of migrating production databases without downtime. Lock contention, expand-contract patterns, online schema tools, ORM pitfalls, and the incident stories nobody talks about.

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screen-recording27. 3. 2026·27 min čtení

Best Free Screen Recorders in 2026: Record Your Screen Without Downloading Anything

Record your screen, webcam, or both — directly in your browser. No software to install, no watermarks, no time limits. The best free screen recording tools of 2026.

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pdf26. 3. 2026·22 min čtení

Best Free PDF Editor Online in 2026: Edit, Merge, Split & Sign Without Software

Stop paying for Adobe Acrobat. These free browser-based PDF editors let you edit text, merge files, compress, split, add signatures, and convert — no download required.

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video-editing26. 3. 2026·36 min čtení

Best Free Online Video Editors in 2026: Edit Videos Without Downloading Software

Premiere Pro costs $23/month. These free browser-based video editors handle trimming, cutting, merging, effects, and subtitles — no download, no watermark.

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open-source24. 3. 2026·13 min čtení

Best Open Source Alternatives to Paid Software 2026 — Save Money, Keep Control

Replace expensive software with powerful open source alternatives. From Photoshop to Office to Slack — find free, open source tools that match or beat paid options.

toolsproductivity

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open-source23. 3. 2026·10 min čtení

Best Open Source Alternatives to Popular Software in 2026

Discover 650+ open source alternatives to popular commercial software. Save money without sacrificing quality with these free, community-driven tools.

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tools22. 3. 2026·15 min čtení

Best Free File Converter Online 2026 — Convert Any File Format Instantly

Convert documents, images, audio, video, and data files between any format online for free. No software to install — compare the fastest and most reliable converters.

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pdf20. 3. 2026·28 min čtení

How to Compress PDF Files Without Losing Quality: Free Methods That Actually Work

That 45MB PDF won't attach to your email. Here's how to shrink PDF files by 80% while keeping text sharp and images clear — free, no software needed.

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pdf20. 3. 2026·19 min čtení

How to Edit PDFs Online for Free — The Complete Guide (2026)

Learn how to edit, merge, split, compress, and convert PDFs online without paying a cent. Step-by-step instructions for every common PDF task.

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games18. 3. 2026·12 min čtení

50+ Free Online Games You Can Play in Your Browser

Discover 50+ free online games you can play directly in your browser with no downloads or installs. From puzzles to strategy games, find your next favorite.

browser-gamesfree-gamesonline-games

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websocket18. 3. 2026·30 min čtení

WebSockets at Scale: Architecture, Reconnection, and the Mistakes I Keep Seeing

Everything I learned building real-time features with WebSockets. Connection management, scaling beyond one server, heartbeats, reconnection strategies, and why most tutorials skip the hard parts.

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writing17. 3. 2026·32 min čtení

Best Free Online Text Tools for Writers in 2026: Word Count, Grammar, Formatting, and More

Word counters, case converters, text comparers, grammar checkers, readability analyzers — the free browser tools every writer needs. No signups, no subscriptions.

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photo-editing16. 3. 2026·17 min čtení

Remove Image Backgrounds for Free: No Photoshop, No Uploads, No Limits

AI-powered background removal now runs entirely in your browser. No file uploads, no per-image fees, no watermarks — just drag, drop, and download.

aifree-toolsdesignproductivity

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ai15. 3. 2026·32 min čtení

LLMs in Production Web Apps: Streaming, Caching, Cost Control, and What the Tutorials Skip

The real engineering behind integrating large language models into web applications. Streaming responses, managing costs, handling failures, prompt management, caching strategies, and building AI features users actually want.

llmweb-developmentstreamingarchitecture

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tools13. 3. 2026·14 min čtení

Encode & Decode Base64, JWT, URL & HTML Online Free — Developer Tools Guide

Encode and decode Base64, JWT tokens, URLs, and HTML entities online for free. Understand when and why to use each encoding — with practical examples.

web-developmentdeveloper

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seo12. 3. 2026·15 min čtení

SEO Is Not Enough Anymore: A Developer's Guide to Generative Engine Optimization

Traditional SEO gets you ranked. GEO gets you cited by AI. Here's how to optimize your site for both Google and AI-powered search engines like ChatGPT, Perplexity, and Google AI Overviews — with code examples.

aiweb-developmentnext.jsarchitecture

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open-source12. 3. 2026·19 min čtení

Top 20 Open Source Alternatives to Popular Paid Software in 2026

Save money with the best open source alternatives to Photoshop, Slack, Notion, and more. Free, community-driven software that rivals paid tools in 2026.

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converter11. 3. 2026·9 min čtení

Free Online Unit Converters: 200+ Conversion Tools

Convert between units of length, weight, temperature, volume, speed, and 200+ more categories. Free, instant, and accurate online unit converters.

free-toolsmathreference

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rust10. 3. 2026·31 min čtení

Rust for JavaScript Developers: The Mental Model Shift That Changes Everything

A JavaScript developer's honest journey into Rust. Ownership, borrowing, lifetimes explained through the lens of someone who thinks in closures and callbacks. What clicked, what didn't, and why Rust made me a better JS developer.

javascriptsystems-programminglearningperformance

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image-editing8. 3. 2026·30 min čtení

How to Crop, Rotate, and Flip Images Online for Free: Quick Guide for Any Device

Crop to exact dimensions, rotate any angle, flip horizontally or vertically — all free, in your browser, on any device. No app download, no account needed.

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photo-editor8. 3. 2026·10 min čtení

Free Online Photo Editor: Professional Editing Without Downloads

Edit photos like a pro with our free online photo editor. Layers, filters, AI tools, HDR, templates, and more — Photoshop-level editing right in your browser.

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converter6. 3. 2026·23 min čtení

How to Convert Images Between PNG, JPG, WebP, SVG, and More: Free Online Guide

PNG to JPG, WebP to PNG, SVG to PNG, HEIC to JPG — convert any image format to any other format for free, instantly, in your browser. No software needed.

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web35. 3. 2026·11 min čtení

On-chain data v produkci: Co vam nikdo nerekne

Blockchain data nejsou cista, spolehlivá ani jednoduchá. RPC rate limity, reorganizace řetězce, BigInt bugy a kompromisy indexovani — těžké lekce z dodavani reálných DeFi produktu.

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api4. 3. 2026·11 min čtení

API Testing Made Easy: Free Tools and Best Practices

Learn API testing fundamentals with free online tools. Master REST API testing, HTTP methods, status codes, headers, authentication, and debugging techniques.

testingdeveloper-toolsweb-development

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tools4. 3. 2026·15 min čtení

Convert Audio Files Free Online — MP3, WAV, OGG, FLAC & More

Convert between MP3, WAV, OGG, FLAC, AAC and other audio formats online for free. No software needed — understand audio codecs, bitrates, and quality tradeoffs.

converteraudio

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css3. 3. 2026·22 min čtení

Moderní CSS v roce 2026: Vlastnosti, které změnily způsob, jakým píšu styly

Container queries, CSS layers, :has(), color-mix(), nesting, scroll-driven animace a anchor positioning. CSS vlastnosti, díky kterým jsem přestal sahat po JavaScriptu.

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ethereum2. 3. 2026·29 min čtení

Ethereum pro webové vývojáře: Smart kontrakty bez hype

Koncepty Etherea, které každý webový vývojář potřebuje: účty, transakce, smart kontrakty, ABI kódování, ethers.js, WAGMI a čtení on-chain dat bez vlastního nodu.

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games1. 3. 2026·35 min čtení

Best Free Brain Training Games Online in 2026: Sharpen Your Mind Without Paying a Cent

Lumosity charges $70/year. These free browser-based brain games offer puzzles, strategy, word challenges, and logic training — no subscription, no app download.

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gaming1. 3. 2026·27 min čtení

Play Sudoku Online Free: Beginner to Expert Strategies That Actually Work

Sudoku isn't just about filling in numbers. Master these strategies — from naked singles to X-Wing — and you'll solve expert puzzles in minutes, not hours.

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kubernetes28. 2. 2026·30 min čtení

Kubernetes for App Developers: Cut Through the Complexity

Kubernetes explained for developers who just want to deploy their apps. No cluster admin deep dives. Pods, services, deployments, config maps, health checks, and the debugging workflow that actually works.

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tailwind28. 2. 2026·19 min čtení

Tailwind CSS v4: Co se skutečně změnilo a jestli migrovat

CSS-first konfigurace, integrace @layer, vestavěné container queries, výkon nového enginu, breaking changes a moje upřímná zkušenost s migrací z v3 na v4.

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css27. 2. 2026·14 min čtení

CSS Flexbox vs Grid — When to Use Which (With Examples)

Understand the difference between CSS Flexbox and Grid with side-by-side examples. Learn when to use each layout system for responsive web design.

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converter25. 2. 2026·12 min čtení

Free Data Format Converters: JSON, CSV, XML, YAML and More

Convert between JSON, CSV, XML, YAML, TOML, and more data formats instantly. Free online converters with no signup, no upload — all processing in your browser.

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bun24. 2. 2026·24 min čtení

Bun v produkci: Co funguje, co ne a co mě překvapilo

Bun jako runtime, package manager, bundler a test runner. Reálné benchmarky, mezery v kompatibilitě s Node.js, migrační vzory a kde Bun používám v produkci dnes.

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markdown24. 2. 2026·10 min čtení

Markdown Syntax Guide — Everything You Need to Know in 2026

Master Markdown syntax from basics to advanced features. Headings, lists, tables, code blocks, links, and GitHub Flavored Markdown — all with examples.

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sudoku23. 2. 2026·12 min čtení

How to Solve Sudoku: Tips and Strategies for Every Level

Master Sudoku with proven strategies from beginner to expert. Learn scanning, elimination, naked pairs, X-Wing, and more techniques to solve any puzzle.

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tools22. 2. 2026·13 min čtení

How to Minify CSS, JavaScript & HTML Online Free — Complete Guide

Learn how to minify CSS, JavaScript, and HTML files online for free. Reduce file sizes by 30-70%, improve page speed, and boost your Core Web Vitals scores.

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observability22. 2. 2026·29 min čtení

Building an Observability Stack That Actually Helps You Debug at 3 AM

The three pillars are not enough. Here is how to build a full observability stack with OpenTelemetry, structured logging, distributed tracing, and alerting that does not wake you up for nothing — across languages and infrastructure.

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json19. 2. 2026·16 min čtení

JSON Formatter and Validator — How to Pretty Print JSON Online

Format, validate, and pretty print JSON data instantly in your browser. Learn JSON syntax rules, common errors, and tips for working with JSON APIs.

developer-toolsfree-toolsapiweb-development

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image18. 2. 2026·15 min čtení

WebP Image Format: Why You Should Convert Your Images and How to Do It Free

WebP reduces image size by 25-35% vs JPEG with identical quality. Here's why it matters for web performance — and how to convert your entire image library for free.

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edge17. 2. 2026·16 min čtení

Edge Functions: Co to je, kdy je použít a kdy ne

Edge runtime, V8 isoláty, mýtus o cold startu, geo-routing, A/B testování, autentizace na edge a proč jsem některé věci přesunul zpět na Node.js. Vyvážený pohled na edge computing.

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learn-to-code17. 2. 2026·12 min čtení

Learn to Code for Free in 2026: Resources, Tools and Platforms

Start your coding journey with the best free resources in 2026. From interactive tutorials and online IDEs to practice tools and learning paths for beginners.

programmingbeginnerseducation2026

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developer-tools16. 2. 2026·13 min čtení

Best Free Online Markdown Editors in 2026: Write, Preview, and Export Instantly

Write beautiful documentation, README files, blog posts, and notes in Markdown — with live preview, syntax highlighting, and export to HTML/PDF. Free, no signup.

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social-media13. 2. 2026·27 min čtení

Best Free Hashtag Generators in 2026: Get More Reach on Instagram, TikTok, and X

The right hashtags can 10x your reach. These free hashtag generators find trending, niche, and optimized tags for Instagram, TikTok, X, LinkedIn, and YouTube.

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code-editor13. 2. 2026·11 min čtení

Free Online Code Editor: Write, Run & Share Code in 53 Runtimes

A free browser-based code editor supporting 53 runtimes. Syntax highlighting, 10 themes, 45 commands, auto-completion, and instant execution.

developer-toolsprogrammingeducation

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converter12. 2. 2026·19 min čtení

The Ultimate Guide to Online Unit Converters (Beyond Google's Basic Math)

Google converts kg to lbs. But for color spaces, data formats, encoding schemes, and time zones — you need real converter tools. Here's the complete guide.

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node.js11. 2. 2026·30 min čtení

Observabilita v Node.js: Logy, metriky a traces bez složitosti

Strukturované logování s Pino, metriky s Prometheus, distribuovaný tracing s OpenTelemetry. Stack pro observabilitu, který používám pro produkční Node.js aplikace, od nuly po plnou viditelnost.

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deno10. 2. 2026·26 min čtení

Deno 2 in Practice: Node Compatibility, JSR, and Whether It's Finally Ready

Deno 2 bet everything on Node.js compatibility and the new JSR registry. After migrating a real project, here's what works, what's still rough, and whether Deno finally has a path to mainstream adoption.

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pdf-tools10. 2. 2026·11 min čtení

Free PDF Tools Online: Edit, Convert, Merge and More

Access 56+ free PDF tools online. Edit, merge, split, convert, compress, and sign PDFs directly in your browser. No signup or software installation needed.

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developer-tools9. 2. 2026·17 min čtení

How to Convert JSON to CSV (And Back) — The Developer's Complete Guide

JSON and CSV are the two most common data formats, but converting between them is surprisingly tricky. Here's how to handle nested objects, arrays, and edge cases.

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photo-editing7. 2. 2026·24 min čtení

Best Free Online Photo Editors in 2026: No Download, No Signup, No Watermark

Photoshop costs $23/month. These browser-based photo editors offer layers, filters, AI tools, and batch editing — completely free, no account required.

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news7. 2. 2026·17 min čtení

How I Read World News Without Algorithms Deciding What I See

Social media algorithms show you what gets clicks, not what matters. Here's how I built a news reading habit using RSS, multi-source aggregation, and zero algorithmic filtering.

privacyproductivityrssmedia-literacy

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sql5. 2. 2026·12 min čtení

SQL Window Functions: The Feature That Changed How I Write Every Query

Window functions are the single most underused SQL feature. Running totals, rankings, moving averages, gap analysis, and session detection — all without subqueries. Real examples from production databases.

postgresqldatabaseperformancebackend

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base644. 2. 2026·8 min čtení

Base64 Encoding and Decoding Explained with Examples

Learn what Base64 encoding is, how it works, and when to use it. Includes practical examples and a free online Base64 encoder/decoder tool.

encodingdeveloper-toolstutorial

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text-tools3. 2. 2026·11 min čtení

Free Online Text Tools: Transform, Convert & Analyze Text Instantly

53 free online text tools for every need. Case converters, word counters, text formatters, encoders, Lorem Ipsum generators, and more — all instant and free.

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turborepo3. 2. 2026·28 min čtení

Turborepo monorepa: Setup, který skutečně škáluje

Jak strukturuji Turborepo monorepa pro více aplikací sdílejících balíčky. Konfigurace workspace, pipeline caching, sdílené TypeScript configy a chyby, které jsem udělal v prvním měsíci.

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regex2. 2. 2026·7 min čtení

Regex Cheat Sheet 2026: Regular Expressions Made Simple

Master regular expressions with this comprehensive cheat sheet. Learn regex patterns, syntax, and real-world examples with a free online regex tester.

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games1. 2. 2026·10 min čtení

Top 25 Free Browser Games You Can Play Right Now — No Download Required

Play the best free browser games instantly — no download, no signup. Puzzle, strategy, arcade, word games and even multiplayer FPS, all in your browser.

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security1. 2. 2026·16 min čtení

How to Create Strong Passwords — A Complete Security Guide for 2026

Learn how to create unbreakable passwords, use password managers, and protect your accounts from hackers. Free password generator and strength checker included.

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security30. 1. 2026·22 min čtení

Password Security in 2026: Why Most Password Advice Is Outdated

8 characters with a special symbol hasn't been secure for years. Here's what actually works — passphrase generation, entropy math, and the tools that help.

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website-monitoring29. 1. 2026·27 min čtení

How to Check If a Website Is Down: Free Tools and Methods That Actually Work

Is it just you, or is the website actually down? Here's how to check any website's status instantly — plus how to monitor services and get alerts when they go offline.

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serverless28. 1. 2026·32 min čtení

Serverless Beyond the Hype: Patterns, Anti-Patterns, and the $20K Monthly Bill

Serverless isn't just Lambda functions. Event-driven architectures, fan-out patterns, saga orchestration, cold starts, vendor lock-in, and the cost surprises that hit when your traffic actually grows.

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pdf27. 1. 2026·17 min čtení

How to Convert PDF to Word for Free (Without Uploading Your Files Anywhere)

Every 'free' PDF to Word converter wants to upload your file to their server. Here's how modern browser tech lets you convert locally — no uploads, no limits, no accounts.

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converter26. 1. 2026·24 min čtení

How to Convert Video to GIF for Free: Best Tools and Tips for 2026

Turn any video clip into a perfect GIF — trim, resize, optimize file size, and share. Free browser-based tools that work on any device without software.

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design24. 1. 2026·12 min čtení

Free Color Tools: Palette Generators, Pickers and Converters

Explore free color tools for designers and developers. Generate palettes, pick colors, convert between formats, check contrast, and find the perfect color scheme.

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tools22. 1. 2026·13 min čtení

Best Free Data Visualization Tools Online 2026 — Charts, Dashboards & Infographics

Turn raw data into stunning charts, dashboards, and infographics with these free online tools. No coding required — compare the best data visualization platforms.

datadesignproductivity

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news22. 1. 2026·11 min čtení

World News Aggregator: Stay Informed with 1000+ Sources in 20 Languages

Access real-time world news from 1144 RSS sources across 15 categories, 5 regions, and 20 languages. Interactive 3D globe, custom feeds, and RSS export.

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tools21. 1. 2026·12 min čtení

Best Free Email Template Builder Online 2026 — HTML Emails Without Coding

Build professional HTML email templates online for free. Drag-and-drop editors, responsive designs, and no coding required — compare the best email builders.

designproductivity

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trpc21. 1. 2026·24 min čtení

tRPC: End-to-end typová bezpečnost bez ceremonií

Jak tRPC eliminuje problém API kontraktu, funguje s Next.js App Router, řeší auth middleware, nahrávání souborů a subscriptions. Reálný tRPC setup od nuly.

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accessibility20. 1. 2026·11 min čtení

Web Accessibility Guide 2026: WCAG Compliance Made Simple

Make your website accessible to everyone. Learn WCAG 2.1 AA compliance, color contrast ratios, keyboard navigation, screen readers, and ARIA best practices.

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webassembly17. 1. 2026·26 min čtení

WebAssembly Beyond the Hype: When It Actually Makes Sense

A practical, no-nonsense guide to WebAssembly. Real benchmarks, actual use cases, toolchain comparisons, memory management, WASI, and an honest look at when WASM is worth the complexity — and when it absolutely is not.

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monorepo16. 1. 2026·27 min čtení

Monorepos in 2026: Nx, Turborepo, and the Lessons Nobody Shares

The strategic decisions behind monorepo tooling that blog posts skip over. Nx vs Turborepo vs Bazel in practice, remote caching failures, CI pipelines that actually work at scale, and when your monorepo has quietly become a monolith.

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sql16. 1. 2026·11 min čtení

SQL Cheat Sheet 2026: Essential Queries Every Developer Needs

Master SQL with this comprehensive cheat sheet. Learn essential queries, JOINs, subqueries, window functions, and optimization tips with practical examples.

databasedeveloper-toolscheat-sheet

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graphql15. 1. 2026·30 min čtení

GraphQL vs REST: After Using Both in Production, Here's What I Actually Think

Not another 'GraphQL is better' or 'REST is simpler' post. Real production experience with both, including the parts that GraphQL evangelists won't tell you and the REST limitations that actually matter.

restapi-designarchitecturebackend

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linux14. 1. 2026·26 min čtení

Linux Internals Every Developer Should Know: Processes, Memory, Networking, and the Kernel

A deep dive into the Linux internals that matter for application developers: process lifecycle, memory management, networking stack, cgroups, eBPF, and the debugging tools that will save you at 3 AM.

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converter12. 1. 2026·22 min čtení

Best Free Online Unit Converters in 2026: Length, Weight, Temperature, Currency, and More

Convert anything to anything: metric to imperial, Celsius to Fahrenheit, USD to EUR, bytes to gigabytes, and 200+ more conversions — free, instant, no app required.

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developer-tools10. 1. 2026·9 min čtení

Best Free Developer Tools in 2026: The Ultimate Collection

Discover the best free developer tools available in 2026. From JSON formatters to API testers and code playgrounds, explore 557+ free online tools for developers that boost productivity.

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converter10. 1. 2026·13 min čtení

How to Convert Between JSON, CSV, XML, and YAML for Free: The Complete Data Format Guide

JSON to CSV, CSV to JSON, XML to JSON, YAML to JSON — convert between all major data formats instantly in your browser. Free, no signup, handles large files.

developer-toolsfree-toolsdataonline-tools

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games8. 1. 2026·31 min čtení

25 Best Multiplayer Browser Games in 2026: No Download, No Install, Just Play

Board games, strategy, FPS, word games — all playable in your browser with friends. No downloads, no app stores, no waiting. The best free multiplayer browser games of 2026.

multiplayerbrowser-gamesfree-gamesonline-gaming

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api7. 1. 2026·10 min čtení

500+ Free Public APIs for Your Next Project: The Ultimate Developer Directory

Browse 500+ free public APIs organized by category. Weather, finance, AI, social media, maps, and more — find the perfect API for your next project.

web-developmentdeveloper-toolsprogramming

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seo6. 1. 2026·12 min čtení

Free Website SEO Analyzer & Performance Checker: Audit Your Site in Seconds

Analyze your website's SEO, performance, security, and accessibility for free. Get actionable recommendations with our comprehensive 20+ module site analyzer.

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testing6. 1. 2026·29 min čtení

Průvodce testováním s Vitest: Od nuly po produkční jistotu

Unit testy, integrační testy, testy komponent s Testing Library, strategie mockování, konfigurace coverage a filozofie testování, která skutečně produkuje lepší software.

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image-editing5. 1. 2026·27 min čtení

How to Resize Images Online for Free: The Complete 2026 Guide

Resize any image to exact dimensions, compress for web, batch resize for social media — all free, no signup, no watermark. Works on phone and desktop.

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free-tools3. 1. 2026·16 min čtení

25 Best Free Online Tools Every Developer Needs in 2026

Discover the top 25 free online developer tools for 2026 — from code formatters and API testers to JSON validators and image optimizers. All browser-based, no install required.

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design2. 1. 2026·25 min čtení

How to Create a Color Palette from Any Image: Free Tools and Design Tips for 2026

Extract beautiful color palettes from photos, artwork, and screenshots. Free browser tools that give you hex codes, RGB values, and exportable palettes instantly.

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resume31. 12. 2025·20 min čtení

Best Free Resume Builders Online in 2026: Create a Professional CV Without Paying

Resume builders charge $25/month for what should be free. Here's how to create a professional, ATS-friendly resume online — no subscription, no watermark, no tricks.

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cron31. 12. 2025·10 min čtení

Cron Expression Guide: Schedule Tasks Like a Pro

Master cron expressions with this complete guide. Learn cron syntax, common schedules, real-world examples, and use a free cron expression generator.

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tools28. 12. 2025·13 min čtení

Best Free Mind Map Maker Online 2026 — Brainstorm & Organize Ideas Visually

Create mind maps online for free with no downloads required. Compare the best free mind mapping tools for brainstorming, project planning, and visual note-taking.

productivitydesign

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markdown28. 12. 2025·10 min čtení

Free Online Markdown Editor with Live Preview: Write Beautiful Docs

Write and preview Markdown in real-time with our free online editor. Syntax highlighting, export to HTML/PDF, GitHub-flavored Markdown support, and zero setup.

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downdetector27. 12. 2025·13 min čtení

Is It Down or Just Me? How to Check Website Status

Learn how to quickly check if a website is down for everyone or just you. Monitor 1707+ services with real-time status updates and outage history.

website-monitoringtoolstroubleshooting

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design25. 12. 2025·12 min čtení

Free Color Palette Generator & Color Picker for Web Designers

Generate beautiful color palettes and pick perfect colors for your designs. Free online color tools with HEX, RGB, HSL support and accessibility contrast checking.

color-toolsweb-designfree-tools

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tools23. 12. 2025·15 min čtení

Best Free Presentation Maker Online 2026 — Create Slides Without PowerPoint

Create professional presentations online for free — no PowerPoint needed. Compare the best free slide makers with templates, animations, and collaboration features.

productivitydesign

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design23. 12. 2025·24 min čtení

How to Create Stunning Infographics for Free in 2026: Tools, Templates, and Tips

Infographics get 3x more shares than any other content. Here's how to create professional infographics for free — no design skills needed, no Canva Pro required.

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ai21. 12. 2025·32 min čtení

Best Free AI Image Tools Online in 2026: Edit, Enhance, and Create Without Paying

AI can remove backgrounds, upscale photos, enhance quality, and generate images — and you don't need to pay for it. The best free AI image tools that run in your browser.

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css21. 12. 2025·11 min čtení

Free CSS Generators: Gradients, Shadows, Grids and More

Generate CSS code for gradients, shadows, grids, flexbox layouts, animations, and more. Free visual tools that output clean, production-ready CSS.

web-developmentgeneratorsfrontend

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micro-frontends20. 12. 2025·26 min čtení

Micro-Frontends: The Honest Reality After Trying It

What actually happens when teams adopt micro-frontends in the real world. Module federation, shared dependencies, routing, styling conflicts, and why the org chart matters more than the architecture.

architecturereactmodule-federationfrontend

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developer-tools18. 12. 2025·15 min čtení

Compare Text Online: The Best Free Diff Tools for Code, Documents, and Data

Whether it's two config files, contract revisions, or API responses — you need a diff tool. Here are the free browser-based options that handle it all.

textproductivityfree-toolsprogramming

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pdf16. 12. 2025·26 min čtení

How to Create a Digital Signature Online for Free: Sign PDFs and Documents Instantly

Stop printing, signing, scanning, and emailing. Create your digital signature and sign PDFs directly in your browser — free, legally valid, no account needed.

digital-signaturefree-toolsproductivityonline-tools

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learning16. 12. 2025·17 min čtení

Learn to Code for Free in 2026 — Best Interactive Platforms & Resources

Start coding for free with the best interactive learning platforms in 2026. From JavaScript to Python — compare resources, learning paths, and hands-on tools.

web-developmentprogramming

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photo-editing14. 12. 2025·24 min čtení

How to Add Watermarks to Photos for Free: Protect Your Images Online

Protect your photos from theft with text or logo watermarks — free, in your browser, with batch support. No Photoshop needed, no watermark on the watermark tool.

free-toolsphotographyonline-toolscopyright

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developer-tools14. 12. 2025·11 min čtení

Best Free Online Developer Tools Every Developer Needs in 2026

Discover the best free online developer tools for 2026. JSON formatters, code editors, API testers, converters, and more — all in your browser, no installation needed.

web-developmentproductivityfree-tools

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ai11. 12. 2025·27 min čtení

Building AI Agents That Actually Work: Architecture, Patterns, and Hard Lessons from Production

The engineering reality behind AI agents in 2026. Tool orchestration, memory systems, planning loops, guardrails, cost control, and the architecture patterns that separate demo agents from production agents.

llmarchitecturetypescriptbackend

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multiplayer-games11. 12. 2025·9 min čtení

Best Free Multiplayer Browser Games to Play With Friends in 2026

Play the best free multiplayer browser games with friends. 16 real-time multiplayer games including board games, strategy, and even a 3D FPS — no download needed.

browser-gamesfree-gamessocial-gaming

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privacy9. 12. 2025·30 min čtení

How to Protect Your Online Privacy in 2026: Free Tools and Practical Steps

Your data is being collected, sold, and breached constantly. Here are the free tools and simple habits that actually protect your privacy online — no tech degree needed.

securityfree-toolsonline-safetyinternet

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news8. 12. 2025·10 min čtení

World News from 1000+ Sources: Your Free News Aggregator

Stay informed with news from 1144+ RSS sources across 15 categories, 5 regions, and 20 languages. Free world news aggregator with 3D globe visualization.

world-newsrssfree-tools

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tools7. 12. 2025·16 min čtení

Best Free Online Whiteboard Tools 2026 — Collaborate, Draw & Brainstorm

Find the best free online whiteboard tools for real-time collaboration, brainstorming, and visual planning. No downloads needed — compare features, limits, and use cases.

productivitycollaboration

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browser7. 12. 2025·26 min čtení

How Browsers Actually Render Pages: A Deep Dive for Performance Obsessives

From HTML bytes to pixels on screen — the complete rendering pipeline explained with the depth that actually helps you write faster code. Hidden classes, compositing layers, reflow triggers, and the real mechanics behind every frame.

performancerenderingjavascriptweb-development

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security4. 12. 2025·29 min čtení

Best practices pro bezpečnost API: Checklist, který spouštím na každém projektu

Autentizace, autorizace, validace vstupů, rate limiting, CORS, správa secrets a OWASP API Top 10. Co kontroluji před každým produkčním deploymentem.

apibackendnode.jsweb-development

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design4. 12. 2025·20 min čtení

Free Color Palette Generators and Tools Every Designer Needs in 2026

Color theory meets practical tooling. Generate harmonious palettes, check WCAG contrast, convert between color spaces, and extract colors from images — all free.

colorfree-toolsaccessibilitycss

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generator4. 12. 2025·16 min čtení

Free QR Code Generators That Don't Track You or Watermark Your Codes

Most free QR code generators add tracking pixels, watermarks, or expire after 30 days. Here's how to find ones that generate clean, permanent codes client-side.

free-toolsqr-codeprivacymarketing

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qr-code3. 12. 2025·16 min čtení

How to Generate QR Codes for Free — Complete Guide With Use Cases

Create QR codes for URLs, WiFi, vCards, and more — completely free. Learn QR code types, best practices, and creative use cases for business and personal use.

free-toolsgeneratormarketingonline-tools

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gaming1. 12. 2025·23 min čtení

Wordle Strategy Guide: How to Solve It in 3 Tries (Almost) Every Time

There's a math-optimal Wordle strategy. The best starting word. The elimination logic. Here's everything from information theory applied to a five-letter word game.

word-gamespuzzlestrategybrain-training

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api29. 11. 2025·25 min čtení

API Versioning Strategies: The Hard Lessons from Running APIs in Production for 8 Years

URL versioning, header versioning, date-based versioning, deprecation policies, schema evolution, and the migration playbook. What actually works when you have real consumers depending on your API.

restversioningbackendarchitecture

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web-performance28. 11. 2025·13 min čtení

How to Speed Up Your Website — 20 Proven Performance Tips for 2026

Boost your website speed with 20 actionable performance optimization tips. Improve Core Web Vitals, reduce load times, and rank higher in search results.

seocore-web-vitalsfrontendoptimization

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games27. 11. 2025·15 min čtení

30 Best Free Browser Games to Play Right Now (No Download Required)

Play the best free browser games instantly — no download, no signup. From puzzle and strategy to arcade and multiplayer games, all running directly in your browser.

browser-gamesfree-gamesonline-gamesentertainment

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tools25. 11. 2025·14 min čtení

Convert EPUB to PDF Free Online — Plus MOBI, AZW3 & More Ebook Formats

Convert EPUB to PDF, MOBI, and other ebook formats online for free. No software to install — just upload, convert, and download. Preserve formatting and layout.

converterproductivity

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gaming23. 11. 2025·15 min čtení

How to Type Faster: Free Typing Games and Tests That Actually Improve Your Speed

The average person types 40 WPM. With the right practice — gamified, not boring — you can double that in weeks. Here are the free tools and games that work.

typingproductivityword-gamesfree-tools

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timestamp23. 11. 2025·10 min čtení

Unix Timestamp and Epoch Converter: Developer Guide

Convert Unix timestamps to human-readable dates and vice versa. Learn what epoch time is, how it works, and use free converter tools for instant results.

unixdeveloper-toolsconverter

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privacy21. 11. 2025·12 min čtení

Free Online Privacy Tools: Protect Your Data in 2026

Discover free privacy tools to protect your data online. Password generators, hash tools, encryption utilities, and browser-based tools that never upload your files.

securityfree-toolsencryption

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devops21. 11. 2025·12 min čtení

VPS setup, který skutečně funguje: Node.js, PM2, Nginx a deploy bez vypadku

Přesný VPS deployment setup, který používám v produkci — zabezpečení Ubuntu, PM2 cluster mode, Nginx reverse proxy, SSL a deploy skript, který me ještě nezklamal. Žádná teorie, jen to, co funguje.

vpsnginxpm2deploymentinfrastructure

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business20. 11. 2025·32 min čtení

Best Free Invoice Generators Online in 2026: Create Professional Invoices in Minutes

FreshBooks charges $17/month for invoicing. These free online tools let you create, customize, and export professional invoices as PDF — no signup, no subscription.

free-toolsinvoicingproductivityonline-tools

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security20. 11. 2025·19 min čtení

Has Your Email Been in a Data Breach? Here's How to Check and What to Do

Over 12 billion accounts have been exposed in data breaches. Here's how to check if yours is one of them — and the exact steps to take if it is.

privacydata-breachemailonline-tools

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calculator18. 11. 2025·36 min čtení

Best Free Online Calculators in 2026: Scientific, Financial, Health, and More

From mortgage payments to BMI, from scientific equations to tip splitting — the best free online calculators that work in your browser without any app download.

free-toolsproductivityeducationonline-tools

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tools15. 11. 2025·15 min čtení

Best Free SVG Editor Online 2026 — Edit, Create & Optimize Vector Graphics

Discover the best free SVG editors you can use directly in your browser — no downloads, no signups. Edit paths, optimize file size, and create scalable vector graphics online.

designsvgweb-development

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chess15. 11. 2025·13 min čtení

Play Chess Online for Free: Tips, Strategies and More

Play chess online for free against a grandmaster-level AI or challenge friends in real-time multiplayer. Learn chess strategies, openings, and tips for beginners.

gamesstrategymultiplayer

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pdf13. 11. 2025·30 min čtení

How to Merge PDF Files for Free: Combine PDFs Online Without Software

Need to combine multiple PDFs into one? Here's how to merge PDF files for free — in your browser, on any device, without installing anything or creating an account.

free-toolsproductivitydocument-editingonline-tools

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security13. 11. 2025·11 min čtení

How to Create Strong Passwords: Generator, Tips and Practices

Learn how to create unbreakable passwords with a free password generator. Discover password security best practices, common mistakes, and how to stay safe online.

passwordprivacyfree-tools

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pdf-tools11. 11. 2025·10 min čtení

Free Online PDF Tools: Convert, Edit, Merge, Split & More

Complete suite of 56 free online PDF tools. Convert PDF to Word, merge, split, compress, edit, sign, and more — all in your browser, no upload to servers.

productivityfree-toolsconverter

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github-actions10. 11. 2025·29 min čtení

GitHub Actions CI/CD: Zero-downtime deploymenty, které skutečně fungují

Kompletní setup GitHub Actions: paralelní test joby, Docker build caching, SSH deployment na VPS, zero-downtime s PM2 reload, správa secrets a osvědčené workflow patterny.

cicddevopsdeploymentinfrastructure

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tools9. 11. 2025·15 min čtení

How to Create Wireframes & Mockups Free Online — UI/UX Design Tools 2026

Create wireframes, mockups, and prototypes online for free. Compare the best UI/UX design tools that work in your browser — no Figma subscription needed.

designweb-development

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programming8. 11. 2025·17 min čtení

How to Learn Coding for Free in 2026 — The Ultimate Beginner's Roadmap

Start your coding journey for free in 2026. A step-by-step roadmap from HTML/CSS to full-stack development with free resources, projects, and interactive tools.

educationweb-developmentfree-toolscareer

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downdetector6. 11. 2025·12 min čtení

Is It Down? Real-Time Website & Service Status Checker for 1707+ Services

Check if a website or service is down right now. Real-time status monitoring for 1707+ services including YouTube, Discord, Netflix, AWS, and more.

status-checkermonitoringweb-services

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qr-code5. 11. 2025·12 min čtení

Free QR Code Generator: Create Custom QR Codes Online in Seconds

Generate free custom QR codes for URLs, text, WiFi, contacts, and more. Customize colors, add logos, download in multiple formats — no signup or watermarks.

generatorfree-toolsmarketing

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svg3. 11. 2025·10 min čtení

SVG Guide: Create, Optimize, and Convert SVGs for the Web

Complete SVG guide for web developers. Learn to create, optimize, animate, and convert SVG graphics with free online tools. Reduce file sizes by up to 80%.

web-developmentdesignoptimization

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tools2. 11. 2025·17 min čtení

Best Free Grammar Checker Online 2026 — Fix Spelling, Punctuation & Style

Find the best free grammar checkers you can use online without signing up. Compare accuracy, features, and privacy of top grammar checking tools in 2026.

writingproductivity

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api2. 11. 2025·15 min čtení

How to Test REST APIs — A Beginner's Guide to API Testing in 2026

Learn how to test REST APIs with practical examples. Understand HTTP methods, status codes, headers, and authentication. Free online API testing tools included.

rest-apitestingweb-developmentdeveloper-tools

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converter30. 10. 2025·16 min čtení

Online Unit Converter — Convert Length, Weight, Temperature, and More

Convert between metric and imperial units instantly. Length, weight, temperature, volume, speed, and data storage — all with formulas and a free online converter.

free-toolsonline-toolseducationproductivity

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privacy30. 10. 2025·14 min čtení

How to Remove EXIF Metadata from Photos & Files — Protect Your Privacy Online

Learn how to remove EXIF metadata from photos and files to protect your privacy. Strip GPS location, camera info, and personal data before sharing online.

securitytools

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json29. 10. 2025·10 min čtení

How to Format, Validate, and Work with JSON: Complete Guide

Learn how to format, validate, minify, and transform JSON data. Complete guide with examples, common errors, and free online tools to work with JSON.

developer-toolsweb-developmenttutorial

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docker27. 10. 2025·23 min čtení

Docker pro Node.js: Produkční setup, o kterém se nemluví

Multi-stage buildy, non-root uživatelé, health checky, správa secrets a optimalizace velikosti image. Docker patterny, které používám pro každý produkční Node.js deployment.

node.jsdevopsdeploymentinfrastructure

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developer-tools27. 10. 2025·8 min čtení

Free Base64, URL & HTML Encoder/Decoder Tools Online

Encode and decode Base64, URLs, and HTML instantly in your browser. Free developer tools with no data upload — everything processes locally for maximum privacy.

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qr-code27. 10. 2025·12 min čtení

Free QR Code Generator: Create Custom QR Codes Instantly

Create free custom QR codes for URLs, WiFi, vCards, text, and more. No signup required. Learn QR code best practices and creative use cases.

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calculator25. 10. 2025·9 min čtení

Free Online Calculators: Math, Finance, Health and More

Access free online calculators for math, finance, health, science, and everyday needs. Scientific calculators, BMI, mortgage, percentage, and 50+ more tools.

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gaming23. 10. 2025·23 min čtení

Play Chess Online for Free: The 2026 Guide to Browser-Based Chess

You can now play against a grandmaster-level AI entirely in your browser — no downloads, no accounts, no subscriptions. Here's the state of online chess in 2026.

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productivity22. 10. 2025·21 min čtení

Best Free Online Flowchart and Diagram Makers in 2026: No Visio, No Problem

Microsoft Visio costs $280/year. These free browser-based tools let you create flowcharts, mind maps, wireframes, and UML diagrams — no download, no account required.

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regex21. 10. 2025·9 min čtení

Free Regex Tester & Tutorial: Master Regular Expressions Online

Test and debug regular expressions in real-time with our free online regex tester. Syntax highlighting, match explanations, common patterns library, and interactive tutorials.

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chromebook19. 10. 2025·17 min čtení

Chromebook Power User Guide: 40 Browser Tools That Replace Desktop Software

Chromebooks aren't limited — your expectations are. Here are 40 browser-based tools that turn any Chromebook into a productivity powerhouse.

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ocr18. 10. 2025·25 min čtení

How to Extract Text from Images for Free: OCR Tools That Actually Work in 2026

Need to copy text from a photo, screenshot, or scanned document? These free OCR tools extract text from any image instantly — no software, no signup, 100+ languages.

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writing16. 10. 2025·30 min čtení

Best Free Plagiarism Checkers Online in 2026: Protect Your Work Without Paying

Turnitin charges schools thousands. Grammarly Premium costs $30/month. Here are the free plagiarism checkers that actually work — for students, writers, and educators.

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news16. 10. 2025·33 min čtení

How to Read World News Without Algorithms in 2026: Break Free from Your Filter Bubble

Social media feeds you outrage. News apps show you what sells ads. Here's how to read real, unfiltered world news from 400+ sources — with no algorithm deciding what you see.

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developer-tools15. 10. 2025·14 min čtení

Base64 Encoding Explained: What It Is, Why It Exists, and How to Use It

Base64 isn't encryption. It's not compression. It's a way to represent binary data as text — and understanding it will save you hours of debugging.

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image-compression14. 10. 2025·21 min čtení

How to Compress Images Without Losing Quality — Free Online Methods

Reduce image file size by up to 80% without visible quality loss. Compare PNG, JPEG, WebP, and AVIF compression methods with free online tools.

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postgresql13. 10. 2025·20 min čtení

Optimalizace PostgreSQL dotazů: Od pomalých po sub-milisekundové

Techniky optimalizace PostgreSQL, které používám na produkčních databázích. EXPLAIN ANALYZE, strategie indexů, přepisy dotazů a přesné změny, které zkrátily časy dotazů ze sekund na mikrosekundy.

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education12. 10. 2025·11 min čtení

Learn Programming for Free: Interactive Tutorials, Quizzes & Hands-On Practice

Start learning programming for free with 30 interactive modules, 6 categories, 20 widgets, quizzes, achievements, and spaced repetition — no signup required.

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free-tools11. 10. 2025·17 min čtení

100 Free Online Tools That Replace Expensive Software in 2026

Adobe Creative Suite costs $660/year. Microsoft 365 costs $100/year. Here are 100 browser-based alternatives that cost exactly $0 and don't require installation.

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markdown9. 10. 2025·8 min čtení

Markdown Cheat Sheet: Complete Syntax Guide with Examples

Learn Markdown syntax with this complete cheat sheet. Headings, lists, links, images, tables, code blocks, and advanced formatting with live examples.

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gaming7. 10. 2025·17 min čtení

The Best Free Browser Games Worth Playing in 2026

Browser games aren't what they were in 2010. Modern WebGL and multiplayer tech deliver desktop-quality gaming — no downloads, no installs, no accounts.

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infrastructure7. 10. 2025·7 min čtení

Scaling to One Million Users: The Infrastructure Playbook Nobody Shares

The definitive guide to scaling a web application from 0 to 1M+ users. Connection pooling, caching layers, load balancing, background jobs, edge computing, monitoring, and the real war stories that nobody puts in their blog posts.

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git5. 10. 2025·10 min čtení

Git Commands Cheat Sheet 2026: Beginner to Advanced

Master Git with this comprehensive cheat sheet. Essential commands for setup, branching, merging, rebasing, stashing, and advanced workflows with practical examples.

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debugging3. 10. 2025·54 min čtení

The Art of Debugging: How Senior Engineers Find Bugs 10x Faster

Systematic debugging from first principles. Scientific method, memory leaks, race conditions, production debugging, war stories, and the mental models that separate juniors who flail from seniors who fix.

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converter2. 10. 2025·27 min čtení

How to Convert Speech to Text for Free: Best Online Transcription Tools in 2026

Transcribe meetings, lectures, interviews, and voice memos to text — free, in your browser, supporting 100+ languages. No software to install.

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system-design1. 10. 2025·25 min čtení

System Design Interview: The Patterns Nobody Teaches You

The thinking frameworks, back-of-the-envelope math, and architecture patterns that actually matter in system design interviews — from someone who has been on both sides of the table.

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redis29. 9. 2025·31 min čtení

Strategie cachování s Redis, které skutečně fungují v produkci

Cache-aside, write-through, prevence cache stampede, strategie TTL a invalidační vzory. Redis vzory, které jsem používal v produkčních Node.js aplikacích s reálnými příklady kódu.

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database16. 9. 2025·30 min čtení

Návrh databázového schématu: Vzory, které stárnou dobře

Pravidla normalizace, konvence pojmenování, soft delete, audit trail, vzory multi-tenancy, strategie verzování a rozhodnutí o schématu, kterých jsem litoval. Zaměřeno na PostgreSQL.

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git3. 9. 2025·20 min čtení

Git za hranicemi základů: Workflow, které šetří hodiny každý týden

Interaktivní rebase, cherry-pick, bisect, worktrees, reflog záchrana a strategie větvení, které skutečně fungují. Git příkazy, které používám denně a většina vývojářů o nich neví.

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typescript19. 8. 2025·19 min čtení

Pokročilé typy v TypeScriptu: Podmíněné, mapované a šablonové literálové kouzla

Hluboký ponor do nejsilnějších typových vlastností TypeScriptu — podmíněné typy, mapované typy, klíčové slovo infer a šablonové literálové typy. Reálné patterny, které fakt použiješ.

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react5. 8. 2025·27 min čtení

React Server Components: Mentální modely, patterny a nástrahy

Praktický průvodce React Server Components, který jsem si přál mít, když jsem s nimi začínal. Mentální modely, reálné patterny, problém hranice a chyby, které jsem udělal, abys je nemusel opakovat.

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next.js23. 7. 2025·10 min čtení

Strukturovani Next.js projektu ve velkem měřítku: Co jsem se naučil na vlastni kuzi

Těžce získané lekce o organizaci Next.js codebasu, které se nezhroutia pod vlastni vahou. Architektura založena na features, route groups, hranice server/client, pasti barrel souborů a reálná struktura složek.

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general8. 7. 2025·2 min čtení

Hello World: Proč jsem založil tento blog

Příběh tohoto blogu: proč jsem se rozhodl psát, jaká témata budu pokrývat a jak byl tento web postaven od nuly.

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