IconVault's Color Blindness Simulator shows how your images look to people with color vision deficiency, rendering your upload through 8 simulations including protanopia, protanomaly, deuteranopia, deuteranomaly, tritanopia, tritanomaly, achromatopsia and achromatomaly. Upload an image or use the sample and compare side by side. It is free and runs fully in your browser.

About 1 in 12 men has some form of color blindness, most commonly red-green. Checking charts, dashboards, game art and marketing images through these filters catches problems like red/green status dots that look identical. The simulations use SVG color matrix filters for instant, accurate previews with no uploads.