Contrast Checker – WCAG 2.2 AA & AAA

Find the words on a page that are hard to read. Contrast Checker measures every visible text color against its background and marks each one that misses WCAG 2.2 level AA or AAA. Free: unlimited scans, markers and the two-color check, no account. Pro: $6.99 once, no subscription.

WHAT IT DOES
The extension reads the rendered colors of each element, including transparency and opacity, and compares the ratio with the level you choose. Results appear in a small panel that you can move to either side. Labels on a photo or gradient are listed for review, and the eyedropper lets you pick the real background from the screen.

HOW IT WORKS
1. Click the toolbar icon and press Scan this page, or use Alt+Shift+K.
2. Each failing element gets a red frame with its ratio. Click a result to jump to it and see both colors, the font size and the selector.
3. Fix them in your code and scan again.

FREE
• Scan any page for AA and AAA, with the large-text rule applied for you.
• See every problem framed in place, with a list sorted from worst to best.
• Compare two colors by hex value, color picker or eyedropper.
• Start and stop with a keyboard shortcut you can change.

PRO ($6.99, LIFETIME)
• Export the results as a CSV file or a standalone HTML report.
• Get the closest foreground or background color that passes.
• See the APCA lightness score (Lc) next to each ratio.
• Check the hover and focus colors of links and buttons from the page styles.

GOOD TO KNOW
This is a testing aid for success criteria 1.4.3 and 1.4.6. It covers one part of the guidelines and is not a conformance assessment.

PRIVACY
Everything runs in your browser. The extension reads only the tab you scan, and only after you start it. The only data stored is the email address you enter when you buy Pro, which is used to check your purchase.