Contrast Checker
Check color contrast against WCAG AA/AAA.
Contrast Checker is a free, browser-based tool on Toolery. Check color contrast against WCAG AA/AAA. Everything runs locally on your device, so it's fast and completely private — no uploads, no queues, and no sign-up to try it.
Contrast Checker — FAQ
Is Contrast Checker free to use?
Yes. Contrast Checker is completely free on Toolery — no watermarks and no sign-up required to try it.
Is Contrast Checker private — do my files stay on my device?
Yes. Contrast Checker runs entirely in your browser. Your files and input are processed on your own device and never uploaded to a server, so nothing is stored, seen, or shared.
How do I use Contrast Checker?
Check color contrast against WCAG AA/AAA. Open the tool, add your file or input, and get the result instantly — it all happens on your device.
Do my files stay private with Contrast Checker?
Yes. Contrast Checker runs entirely in your browser, so whatever you upload or create stays on your device and is never sent to a server.