Compare software

ARC Toolkit vs AChecker: catalog facts
ARC Toolkit	AChecker
Free Free to install from the Chrome Web Store.	Free Single checks are free; automatic monitoring is a paid ACHECKS subscription.
Browser extension	Web
Runs inside the browser on the current page Uses TPGi's ARC rules engine	Checks by URL, file upload or pasted HTML Choice of several guideline sets and levels
Checks one page at a time Automated checks do not replace manual testing	Guidelines stop at WCAG 2.0 Older interface with limited explanation of fixes
Browser extension	Web application
Closed source	Closed source
License not stated	License not stated
Not stated if an account is needed	No account 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 September 23, 2026

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