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Button Contrast Checker vs ARC Toolkit: catalog facts
Button Contrast Checker	ARC Toolkit
Free Free to use.	Free Free to install from the Chrome Web Store.
Web	Browser extension
Tests all buttons and links on a page at once Checks default, hover and focus states	Runs inside the browser on the current page Uses TPGi's ARC rules engine
Only checks buttons and links, not all text on the page Needs a publicly reachable webpage to scan	Checks one page at a time Automated checks do not replace manual testing
Web application	Browser extension
Closed source	Closed source
License not stated	License not stated
Not stated if an account is needed	Not stated if an account is needed
Needs internet	Not stated if it works offline
Official website Full listing and sources Checked October 2, 2026	Official website Full listing and sources Checked September 23, 2026

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