Decide whether a free online tool is safe for your data

Working after disconnection does not prove that earlier input stayed local; the page may have transmitted data before the network was disabled. Observe requests from a fresh reload, check whether processing continues after a fully offline restart, and read retention and deletion terms. HTTPS protects transport but does not decide what the operator stores. Remove document and image metadata, use a sanitized copy, reject unrelated permissions or extensions, and never paste live credentials. Save and verify the output before closing an anonymous session.