Color Blindness Simulator
Upload an image and see it as people with protanopia, deuteranopia, tritanopia, and achromatopsia see it. Everything runs on your device — fast, free, and private.
Drag & drop an image to simulate
The image is processed in your browser and never uploaded.
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Example
Example Input
(upload an image)
Example Output
(original + 4 simulations side by side)
How to Use
- 1Upload an image (drag & drop or click to choose).
- 2The tool processes the image in your browser.
- 3Copy/inspect the resulting colors.
About Color Blindness Simulator
The Color Blindness Simulator loads your image onto a canvas and shows it through simulations of several common color-vision deficiencies, side by side with the original, using standard LMS transform matrices.
It helps ensure your design stays understandable for the ~8% of men with a color-vision deficiency. The image is processed locally, never uploaded.
FAQ
Is my image uploaded?
No. Color Blindness Simulator runs entirely in your browser — the image is processed locally and never uploaded.