technology
axe-core
axe-core is the open-source accessibility testing engine maintained by Deque Labs under the Mozilla Public Licence 2.0 — used by over 3 billion scans, integrated into Google Lighthouse, browser DevTools, and most third-party accessibility scanners — and the de facto standard rule engine for automated WCAG testing.
About axe-core
Available as an npm package and Chrome/Edge/Firefox extension. Detects approximately 57% of automatable WCAG criteria — still bounded by the 25–30% automation ceiling for WCAG overall.
Where axe-core appears in a AccessivePath audit
Our AI auditors test concepts like axe-core as part of the WCAG 2.2 Level AA audit cycle — both via automated rule scanning and through screen-reader simulation and human pair review.
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