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A professional accessibility-focused color vision deficiency screening experience.
About this tool
A professional accessibility-focused color vision deficiency screening experience.
Ishihara Color Blind Test is a free medical tool that runs entirely in your browser — nothing to install, no account to create, and your data never leaves your device. Open the page, add your input, and get a clean, copy-ready result in seconds.
Open Ishihara Color Blind Test on AltFTool — it loads instantly in your browser.
Add your input to the workspace.
Adjust the options until the result looks right.
Copy or download the output and put it to work.
A focused workspace for one-off content, data, or planning jobs — open it, use it, done.
Start with a rough input and iterate until the result matches exactly what you need.
Copy or download the output for your project, document, or daily workflow.
Yes — Ishihara Color Blind Test is completely free on AltFTool, with no signup, no trial limits, and no hidden costs.
Yes. Ishihara Color Blind Test runs in your browser, so what you enter or upload stays on your device instead of being sent to a server.
A professional accessibility-focused color vision deficiency screening experience. It's built for quick, everyday medical tasks with results you can copy or download straight away.
Yes — Ishihara Color Blind Test works in any modern browser, on desktop, tablet, and mobile, with the same features everywhere.