Color Blindness Simulator

Preview an image as it appears with protanopia, deuteranopia, tritanopia or achromatopsia (total color blindness). Useful for accessibility checks. Everything is processed locally with a canvas — your image never leaves your browser.

Image

Click to choose, or drag & drop an image here

Simulated deficiency

Original

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Simulated

Load an image to simulate

Conversion uses the Brettel/Viénot linear-RGB matrices. Large images are scaled down for processing. Nothing is uploaded.