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WAVE vs Button Contrast Checker: catalog facts
WAVE	Button Contrast Checker
Freemium The online tool and extensions are free; the API and stand-alone testing engine are paid.	Free Free to use.
Web, Browser extension	Web
Shows issues in place on the page Extensions for Chrome, Firefox and Edge	Tests all buttons and links on a page at once Checks default, hover and focus states
Bulk testing requires the paid API or engine Automated results still need human judgement	Only checks buttons and links, not all text on the page Needs a publicly reachable webpage to scan
Web application, Browser extension	Web application
Closed source	Closed source
License not stated	License not stated
Not stated if an account is needed	Not stated if an account is needed
Not stated if it works offline	Needs internet
Official website Full listing and sources Checked September 23, 2026	Official website Full listing and sources Checked October 2, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.