Color Blindness Simulator

See your designs the way color-blind users actually do

Upload any image and instantly view it through four scientifically-published color-vision-deficiency transformation matrices — Protanopia, Deuteranopia, Tritanopia and full Achromatopsia. Every simulation runs locally via canvas pixel manipulation, with the original shown side-by-side and a download button for each version, so you can catch accessibility issues before you ship.

• →Simulates Protanopia, Deuteranopia, Tritanopia and Achromatopsia using published Machado/Viénot-style transformation matrices, not guesswork approximations
• →Original image and each simulated version shown together with instant tab-switching between vision types
• →Download any simulated version as a PNG, or export all four at once for a design review deck
• →Runs entirely on canvas getImageData/putImageData — your image is never uploaded anywhere
• →Watermarked by Cikal Studio Labs · Works on any device, no install required