Color Blindness Simulator applies scientifically accurate color vision deficiency filters to uploaded images or live web pages, simulating how content appears to people with protanopia (red-blind), deuteranopia (green-blind), tritanopia (blue-blind), and their partial variants protanomaly, deuteranomaly, and tritanomaly. It uses the Brettel-Vienot-Mollon algorithm for cone response simulation, which is more accurate than simple color matrix transforms. The tool highlights specific areas where color is the only differentiator, flagging WCAG contrast failures.
UI/UX designers building accessible products, data visualization specialists choosing palettes, and accessibility consultants auditing client websites. The tool runs entirely in your browser — your data never leaves your device.
Learn more about related topics: Protanopia, Deuteranopia, WCAG 1.4.1, Brettel algorithm.
Color Blindness Simulator is a free, browser-based developer tool on AIDToolStack. Simulate how colors appear to people with different types of color blindness. It requires no installation or sign-up and works entirely in your browser.
Yes, completely free. Color Blindness Simulator has no usage limits, no account requirements, and no hidden fees. Use it as often as you need.
No, all processing happens locally in your browser. Your data never leaves your device and nothing is sent to any server.
Yes, it works in any modern browser on both desktop and mobile devices. No app download required — just open the page and start using it.
AIDToolStack tools run entirely in your browser with no server processing. This means faster results, complete privacy, and zero downtime. There are no ads blocking your workflow, and everything is free with no sign-up required.
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