Most of these utilities used to live as command line scripts on someone's laptop. We rewrote them as browser tools so you do not need to install anything to use them. Upload any image and see it through protanopia, deuteranopia, tritanopia, and achromatopsia simulations side by side. Test your brand palette for color pairs that become indistinguishable. 100% in-browser.
The honest one-paragraph version.
Upload any image and see it through protanopia, deuteranopia, tritanopia, and achromatopsia simulations side by side. Test your brand palette for color pairs that become indistinguishable. 100% in-browser.
It runs in your browser. Nothing you paste, drop, or generate leaves your device, which matters when you are dealing with client data or unreleased work.
If any of these sound like you, the tool earns its bookmark.
Built mainly for people building on the web. If you have ever needed see your design through 4 types of color vision deficiency, you are the audience.
Use it for client work without attribution. There is no commercial restriction.
Three steps. The tool does the rest.
Open the tool, drop in the input, and the result appears.
Three reasons that hold up in practice.
Tool sites usually push you toward a Pro upgrade after three uses. We do not have a Pro tier at all. Every feature is free for everyone.
WCAG tools at mytoolstudio share three rules. They run in the browser whenever possible. They never lock features behind sign up. And they keep your data on your device unless server work is the only way.
Small habits that compound across a workweek.
Pair it with your editor's keyboard shortcut for opening URLs and you can flow through it without breaking focus.
Stop reading. Start using.
That is everything worth saying. Open the tool and try it on something real. You will know within a minute whether it belongs in your kit.
If you found this useful, the other WCAG guides are written in the same voice. We keep them short, practical, and rooted in real work.
mytoolstudio is designed and built by the team at GAP3, a small studio that ships product, brand, and growth work for early stage companies. We built this site as a free public good. Read more about us at gap3.co.
Try it now
The tool is one click away. No sign up, no upload, no payment.
Open Color Blindness Simulator