Color Blindness Simulator
See how an image looks with eight types of color blindness.
Free online color blindness simulator. Upload an image to see it through eight color vision deficiencies — protanopia, deuteranopia, tritanopia, their milder anomalous forms, and achromatopsia — using per-pixel color-matrix transforms. Runs entirely in your browser; nothing is uploaded.
How to use the Color Blindness Simulator
- 01Drop or choose an image.
- 02Compare the original with all eight simulated versions side by side.
- 03Download any simulation you want to share or test.
Frequently asked questions
Is my image uploaded to simulate it?
No. Every simulation is computed pixel-by-pixel in your browser on a canvas, so your image never leaves your device.
Which types of color blindness are covered?
Eight: protanopia and protanomaly (red-weak), deuteranopia and deuteranomaly (green-weak), tritanopia and tritanomaly (blue-weak), and achromatopsia and achromatomaly (little to no color).
How accurate are the simulations?
They use well-established RGB color-matrix approximations of color vision deficiency. They're a strong guide for accessibility checks, but individual perception varies.