Complete guide to using Color Blindness Test — a free online tool by akousa.net.
Get started in seconds — no signup required
A color blindness test uses Ishihara-style plates to screen for the most common types of color vision deficiency. It checks for Protanopia, Deuteranopia, and Tritanopia and reports detailed results with severity scores. The test is a quick self-screening tool and is not a substitute for a professional eye exam.
Works directly in your browser — no downloads needed
All processing happens locally — your data never leaves your device
Download your results in multiple formats
Fully responsive design works on any device
View each plate and enter the number or pattern you see within it. Work through the full set of plates without straining or guessing. Review your results at the end, which indicate the likely type and severity of any color vision deficiency.
Color Blindness Test is a free, browser-based tool that runs entirely on your device — no signup, no uploads, and no tracking. Built for speed and privacy, it gives you instant results without leaving the page.
Developers, designers, students, and everyday users rely on this tool for quick, accurate results. It's especially popular among people who need a reliable utility without installing software or signing up for an account.
Looking at alternatives to Color Blindness Test? Here's how we compare to similar tools available online.
| Feature | akousa.net | Other tools |
|---|---|---|
| Price | Free forever | Often paid or freemium |
| Privacy | Runs in your browser | Data sent to servers |
| Signup | Not required | Account often required |
| Ads & tracking | None | Ads and trackers common |
| Usage limits | Unlimited | Daily or file-size limits |
Add Color Blindness Test to your own website with a single line of code — free, no signup required.
Get embed codeColor Blindness Test is also available as a developer API for use in your own apps and workflows.
View API docsConvert ICO icon files to PNG format. The browser renders the largest icon size. Free, browser-based.
Extract dominant colors from any image and get hex, RGB, and HSL codes.
Convert text to binary and binary to text representation.
Convert numbers to words in English with support for ordinals, currency, decimals, and batch conversion.
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