Free Color Blindness Simulator
The Color Blindness Simulator shows how your image looks to people with different types of color vision deficiency. Upload a design and compare the simulations side by side for better accessibility.
How to Use
Upload an image, then compare the original with the simulated views. Use it to check that charts, buttons, and text remain distinguishable for everyone.
- Protanopia, deuteranopia, tritanopia, and achromatopsia
- Side-by-side original vs simulated view
- Runs entirely in your browser — no uploads
- Download any simulated view
- Great for accessibility testing
Why simulate color blindness?
Roughly 1 in 12 men and 1 in 200 women have some form of color vision deficiency. Testing your designs against these simulations helps ensure information is not conveyed by color alone.
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