Contrast checker
WCAG ratio for text & background
Check the WCAG contrast ratio between a text color and a background, with instant pass/fail verdicts for AA and AAA at normal and large sizes. Make sure your design stays readable for everyone.
How it works
- Open the tool and add your file (or paste your text).
- Adjust the options — everything previews instantly.
- Download the result. Done.
Private by design
Contrast checker runs 100% in your browser. Your files are never uploaded to a server, never stored, and never seen by anyone — close the tab and nothing remains.
Free, no limits
Contrast checker has no account, no watermarks and no daily caps. If you also need full design tools, the Ijodly editor is one click away.
Frequently asked questions
Is Contrast checker free to use?
Yes — Contrast checker is completely free. There is no account to create, no watermark on your results and no daily limits.
Are my files uploaded when I use Contrast checker?
No. Contrast checker runs entirely in your browser. Your files never leave your device and nothing is stored on a server — close the tab and nothing remains.
Do I need to install anything or sign up?
Neither. Open the page, use Contrast checker straight away and download your result. No install, no signup.