Private, browser-local utility
Color Blindness Simulator
Preview a local image through bounded protanopia, deuteranopia, or tritanopia simulation.
Inputs, files, and results stay in this browser tab. Nothing is uploaded, fetched, executed, or stored.
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Local simulation
Simulation model and limits
The local pixel transform uses published-style Machado full-deficiency matrices interpolated with the identity matrix in linear-light RGB. This is a practical visualization, not a diagnosis, medical test, or guarantee of accessibility. Pair it with contrast checks and human review.
Files are limited to 15 MB, 8,192 pixels per dimension, and 16 megapixels. Decoding and canvas processing happen locally; no image bytes are uploaded or persisted.