ToolToUse

Color & Design

Color Blindness Simulator

See how an image looks with the most common types of color vision deficiency.

Supported formats: JPG, PNG, WebP. Simulations are approximations of complete deficiencies; partial deficiencies (protanomaly etc.) are milder versions of the same axes. Always also check contrast ratios for text.

JPG · PNG · WebP

Color Blindness Simulator

Up to 25 MB
Options

Applies a Machado–Oliveira–Fernandes simulation matrix (full severity) to every pixel and saves the result as PNG. Upload a design screenshot to check whether important information is still distinguishable. Simulations are approximations of complete deficiencies; partial deficiencies (protanomaly etc.) are milder versions of the same axes. Always also check contrast ratios for text.

Good to know

Frequently asked questions

How do I use it?

Choose your file, adjust the options and press “Simulate”. When it finishes, download the result.

How does it work?

Applies a Machado–Oliveira–Fernandes simulation matrix (full severity) to every pixel and saves the result as PNG. Upload a design screenshot to check whether important information is still distinguishable.

Are there limitations?

Simulations are approximations of complete deficiencies; partial deficiencies (protanomaly etc.) are milder versions of the same axes. Always also check contrast ratios for text.

Are my files uploaded?

No. Files are processed on your device and never sent to our servers. No account is needed.

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