Color blindness simulator

Preview an image as seen under protanopia, deuteranopia, or tritanopia using established simulation matrices.

The image stays in this browser. Nothing is uploaded or stored.

PNG, JPG, or WebP up to 25 MiB. Applies the Machado–Oliveira–Fernandes (2009) full-severity matrices to each pixel — an approximation of how colors read under complete protanopia, deuteranopia, or tritanopia. Output is PNG.

How to use

  1. Choose an image.
  2. Pick a color blindness type.
  3. Simulate, compare with the original, and download the PNG.

What it supports

Applies the Machado–Oliveira–Fernandes (2009) full-severity matrices per pixel — an approximation of complete protanopia, deuteranopia, or tritanopia, not partial forms or anomalous trichromacy. PNG, JPG, or WebP up to 25 MiB; output is PNG.

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