See how your image or design looks to people with protanopia, deuteranopia, tritanopia, or achromatopsia. Free accessibility checker, no upload.
1. Upload Image
Best with UI screenshots, charts, or design mockups
Upload an image to preview it through 4 types of color blindness
About the Color Blindness Simulator Tool
Roughly 1 in 12 men and 1 in 200 women have some form of color vision deficiency. Upload a UI screenshot, chart, or design mockup and DCPIXEL simulates all four major types of color blindness side by side, helping you catch accessibility issues before you ship.
100% Private — Processed in Your Browser
Every file stays on your device. DCPIXEL processes images entirely using the browser's built-in Canvas API and WebAssembly — zero server uploads, zero data collection.
Premium Features & Batch Processing
Get started with our free tier for single-file operations. Upgrade to DCPixel PRO to unlock high-speed batch processing, local AI background removal, and advanced PDF controls.
Frequently Asked Questions
How accurate is this simulation?+
It uses widely-used color transformation matrices to approximate how each color vision deficiency perceives color. It is a helpful guide, not a clinical diagnostic tool.
What should I check for in the results?+
Look for elements that rely only on color to convey meaning — like red/green status indicators — and check whether they remain distinguishable in each simulation.
Which type of color blindness is most common?+
Deuteranopia (reduced green sensitivity) is the most common form, followed by protanopia (reduced red sensitivity). Both primarily affect men.
User Reviews
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