Check WCAG AA/AAA contrast between two hex colors before you ship UI. Pure client-side ratio math — no account, no design-file upload.
A11y
Sample text — ratio 18.88:1
AA normal pass · AAA normal pass
Private by design. Heavy tools (OCR) may take a minute on large files.
How it works
Colors never leave your browser.
1
Enter colors
Foreground and background as #RRGGBB.
2
Read the verdict
See the contrast ratio and AA/AAA pass/fail for normal and large text.
When you’d use this
Check WCAG AA/AAA contrast between two colors — You are checking contrast or HTML before a release with a no-upload checker. You are packaging images into a PDF and want alt-text notes for review.
FAQ
About contrast checker wcag online
Does this replace a full a11y audit?
No — pair with HTML accessibility check for automated axe rules.
What is Contrast Checker for?
Check WCAG AA/AAA contrast between two colors. It runs in your browser on SortMyFile so you can finish the job without an upload converter.
Does Contrast Checker upload files to SortMyFile?
No. Contrast Checker processes locally in the tab. We do not operate an upload API for this tool.
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