Color Blindness Simulator
Simulate how a colour or palette appears to people with protanopia, deuteranopia, tritanopia and achromatopsia, to design more accessible interfaces. Runs in your browser.
Normal vision
Protanopia #696a77
red-blind (~1% of men)
Deuteranopia #5f537d
green-blind (most common)
Tritanopia #2a8b8f
blue-blind (rare)
Achromatopsia #898989
total colour blindness
How a sample palette appears
Normal
Protanopia
Deuteranopia
Tritanopia
Achromatopsia
Simulate how a colour or palette appears to people with protanopia, deuteranopia, tritanopia and achromatopsia, to design more accessible interfaces. Runs in your browser. Color Blindness Simulator is a free, browser-based tool in the Toolsnest color tools collection — there is nothing to install, no account to create and no watermark on your results. It works on desktop, tablet and mobile, and because the work happens on your own device it stays fast even with large inputs.
How to use the Color Blindness Simulator
- Open the Color Blindness Simulator — it runs entirely in your browser with no setup.
- Paste or type your input into the text area, or upload a file where supported.
- Set any options you need, then run the conversion or transformation.
- Review the output instantly; large inputs are handled locally without lag.
- Copy the result to your clipboard or download it. Your data never leaves the page.
Why use the Color Blindness Simulator?
- 100% free with no limits, no sign-up and no watermarks.
- Private by design — your data are processed in your browser and never uploaded to a server.
- Fast and lightweight, with instant results even on a phone or a slow connection.
- Works everywhere — any modern browser on Windows, macOS, Linux, Android or iOS.
- Part of a full color tools suite, so related color blindness simulator tasks are one click away.
Is it private and secure?
Your privacy is built in. The Color Blindness Simulator runs completely on your device, so whatever you enter stays in your browser and is never transmitted, logged or stored on any server.
Frequently asked questions
Is the Color Blindness Simulator free to use?
Yes. The Color Blindness Simulator is completely free with no usage limits, no sign-up and no watermarks. Every feature is available to everyone.
Is my data sent to a server?
No. The Color Blindness Simulator works entirely inside your browser, so your data never leave your device. Nothing is uploaded, stored or shared.
Do I need to install anything or create an account?
No installation and no account are needed. Open the page in any modern browser and start using the Color Blindness Simulator straight away.
Does the Color Blindness Simulator work on mobile?
Yes. It is fully responsive and works in the browser on Android and iOS phones and tablets, as well as on desktop.
Will it work offline?
Once the page has loaded, the Color Blindness Simulator keeps working even if your connection drops, because all the processing runs on your device rather than on a server.