Toolzy

Color Blindness Simulator

Preview an image as seen with color vision deficiencies.

Drop an image here or click to upload

Upload an image to simulate how it looks with protanopia, deuteranopia and tritanopia — useful for accessibility checks.

How to use

  1. Upload an image.
  2. Switch between vision modes.
  3. Compare how colors differ.

Frequently asked questions

Is this medically accurate?
It uses standard simulation matrices — an approximation, not a diagnosis.
Is my image uploaded?
No, processing is local.

Related tools