Color Blindness Simulator
See how images look to people with protanopia, deuteranopia, tritanopia or achromatopsia. Free accessibility tool.
✓ 100% free ✓ No sign up ✓ Runs in your browser — nothing uploaded
How to use Color Blindness Simulator
- 1Drop one or more images into the box above.
- 2Adjust the settings — the preview updates live.
- 3Click “Download” to save, or apply to all images as a ZIP.
Questions
Is Color Blindness Simulator free?
Yes. Color Blindness Simulator is 100% free with no limits, no watermark, no sign up and no email required.
Are my files uploaded to a server?
No. Your files are processed entirely inside your browser using JavaScript. They never leave your device, so it is private and works even on slow connections.
Does Color Blindness Simulator work on my phone?
Yes. Color Blindness Simulator works in any modern browser on iPhone, Android, Windows, Mac, Linux and Chromebook. No app or install needed.
Do I need to create an account?
Never. There is no sign up, no login, no email and no paywall. Just open the page and use it.