Instantly simulate how any picture is perceived by someone with protanopia, deuteranopia, or tritanopia colour blindness. Simply upload your image, select the deficiency type, and the tool produces a downloadable PNG showing the altered colour palette. It’s an invaluable resource for designers, accessibility testers, and anyone curious about colour vision differences—all done locally, with zero data sent to a server.
Protanopia is an inability to perceive red light, deuteranopia affects green perception, and tritanopia affects blue‑yellow perception. The simulator approximates these conditions based on well‑known colour‑deficiency transformation matrices.
No. Everything runs inside your browser. Your file is never sent to a server.
The current version shows only the simulated result, but you can easily toggle back by re‑uploading the original image in a separate tab or using the download to compare.