Color Blindness Simulator
ImagePreview how an uploaded image may appear for protanopia, deuteranopia, tritanopia, and achromatopsia.
Color Blindness Simulator の使い方
Upload any image to preview how it may appear for people with several common color vision deficiencies, including protanopia, deuteranopia, tritanopia, and achromatopsia. Switch between simulation modes, adjust intensity, and compare the original against the transformed result before downloading a PNG. This helps designers catch low-contrast states, confusing chart palettes, or inaccessible UI choices before shipping.
Upload the image you want to test
Use a screenshot, graphic, chart, or social asset that relies on color distinctions.
Choose a simulation mode
Pick the color vision deficiency you want to model, such as deuteranopia or tritanopia.
Adjust intensity and compare
Use the strength slider to inspect a stronger or softer simulation while viewing the original alongside it.
Download the result
Save the simulated PNG for review, handoff, or accessibility discussions.