Color Blindness Simulator

A free browser-based image tool that simulate how images look with various color blindness types. Process your photos and graphics directly in your browser without uploading to any server. Understanding how your designs appear to users with color vision deficiencies is an accessibility step that once required specialized simulation plug-ins. This simulator re-renders any image through the lens of eight common color-blindness types, all in real time within the browser. Switch between eight simulation modes — protanopia, deuteranopia, tritanopia, achromatopsia, and their anomalous variants — to see your image through each type of color vision deficiency. A split-view comparison shows the original alongside the simulated result. Load an image and select a deficiency type from the dropdown — deuteranopia, protanopia, tritanopia, or achromatopsia, among others. The simulated view appears immediately, and a side-by-side toggle lets you compare it against the original color perception. Color-matrix transformations for each deficiency type are applied to pixel data through canvas operations in your browser. The image you are testing is never uploaded, so you can safely evaluate confidential designs or client work.