Color Blindness Simulator
See your design as color-blind users do.
Runs 100% in your browser — nothing is ever uploaded.
What is Color Blindness Simulator?
See your images and colors through protanopia, deuteranopia and tritanopia. Check accessibility instantly — free and 100% in your browser. Pick your options and the result is generated instantly — ready to copy straight into your project. It's completely free, works in any modern browser and requires no sign-up — everything runs locally on your device, so your data never leaves your computer.
How to use Color Blindness Simulator
- Open Color Blindness Simulator in your browser — it's free and needs no account.
- Configure the options to match exactly what you need.
- Click the generate button — the result appears instantly.
- Copy the output or download it as a file for your project.
Frequently asked questions
Is Color Blindness Simulator really free?
Yes — Color Blindness Simulator is 100% free with no limits, no watermarks and no registration. You can use it as often as you like, on as many files or inputs as you need.
Is my data safe when I use Color Blindness Simulator?
Absolutely. Color Blindness Simulator runs entirely in your browser using JavaScript — your input is processed on your own device and is never uploaded to any server.
Does Color Blindness Simulator work on mobile devices?
Yes. Color Blindness Simulator works in any modern browser on desktop, tablet and mobile (Chrome, Firefox, Safari, Edge) — there is no app to install.
Are my images uploaded when I make favicons?
No. The favicon generator resizes your image with the canvas API entirely in your browser and packs the results into a ZIP locally. Your artwork never leaves your device.
Is the generated CSS production-ready?
Yes — the gradient generator outputs standard, modern CSS that works in every current browser, ready to paste into your stylesheet.
What favicon sizes do I get?
The full modern set: favicon.ico (16/32/48), PNGs at 16, 32, 180 (Apple touch), 192 and 512 (Android/PWA), plus a ready-made HTML snippet and webmanifest.