Original
Simulated
Original
Simulated
See how your images, designs and screenshots look to people with color vision deficiency. Upload any photo and pick a vision type to instantly transform it — protanopia (red-blind), deuteranopia (green-blind), tritanopia (blue-blind) or achromatopsia (no color at all). This is a practical accessibility tool for designers, teachers and anyone building charts, interfaces or content that must be readable by everyone.
Everything is processed locally with the browser canvas, so your images are never uploaded to any server. It is free, needs no account and works offline once the page is open.
It uses widely used matrix approximations that are accurate enough for design review, though individual experiences of color blindness vary.
About 1 in 12 men and 1 in 200 women have some form of color vision deficiency, so checking contrast and color choices helps you reach everyone.
Any common image format your browser can open, including JPG, PNG, GIF and WebP.
Disclaimer: This simulation is an approximation for testing purposes, not a medical diagnosis.