Why use a color blindness simulator?

It helps reveal whether color is doing too much work in your design, especially in charts, status badges, error states, and CTA emphasis.

Is the simulation medically exact?

No browser-based simulation is perfect, but it is a practical design check for catching common accessibility issues early.

Does my image leave my computer?

No. The transformation runs locally in canvas and the preview stays in your browser.

Color Blindness Simulator | TinyToolbox

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.

Color Blindness Simulator

So verwendest du Color Blindness Simulator

Upload the image you want to test

Choose a simulation mode

Adjust intensity and compare

Download the result

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