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Color Blindness Simulator

See how your image looks to people with protanopia, deuteranopia or tritanopia. Runs on canvas, offline.

Runs in your browser
No upload on server
Free, forever

How this works— tap to see the steps

1
Drop an image or UI
Load a design, chart or photo you want to check.
2
Try each simulation
See how it looks to deuteranopia, protanopia, tritanopia and more. About 1 in 12 people see colour differently.
3
Fix the failing spots
If key info disappears in a simulation, add labels, patterns or higher contrast.

Watch: colours change to simulate each type

Upload image
Pick a type
Download

Drag an image here, or click to choose one

JPG · PNG · WEBP

Tip: you can also paste an image with ⌘V / Ctrl V

Upload an image to simulate how it looks.

How this works — and why it's private

Drop in any image, then switch between the three common types of color blindness — protanopia (red), deuteranopia (green) and tritanopia (blue). Use it to check charts, UI screenshots and infographics for accessibility.

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