wcagcheckr — WCAG & ADA Accessibility Checker

WCAG & ADA accessibility checker that audits real component states — hover, focus, dark mode, RTL — and flags only NEW issues.

Most accessibility checkers scan a page once, in its default state. Real components break in the states a single scan never sees: on hover, on focus, in dark mode, in forced-colors, in RTL, at mobile widths. wcagcheckr drives your components through that state matrix and runs axe-core at each one — then reports only the NEW violations against your last-known-good baseline, so you fix what changed instead of re-reading inherited debt. WHAT IT CHECKS • Multi-state audits — hover, focus, focus-visible, active, disabled, ARIA states, light/dark/forced-colors, LTR/RTL, breakpoints, with axe-core 4.11.4 run at each combination • All 50 WCAG 2.1 Level AA success criteria • Per-component baselines, so you see only what regressed • Whole-site crawls with cross-page consistency checks • Visual overlays — outline, reading order, tab order, heatmap, vision simulation • PDF accessibility auditing (PDF/UA-1) TWO DIFFERENT GRADES — they are not the same thing • Lawsuit-target safety grade (A/C/D/F) — how exposed you look to the automated scanners that generate demand letters. It is NOT a WCAG conformance grade. • WCAG 2.1 AA grade (A–F) — severity and breadth combined, for the development view. FREE • The Owner view and the lawsuit-target safety grade • Site crawl up to 35 pages • The configurable state matrix • 2 scheduled audits, 3 baselines per component • Export your results as a report for site owners, a letter for developers, or files for your CI tools. • Visual overlays, guided tests, flow recorder, AX-tree viewer, DevTools panel PAID — $5/month, billed monthly, cancel anytime • The Power user and Dev views — the full findings UI • All AI-assisted checks (see below) • PDF/UA auditing • The legal and evidence stack: VPAT, WCAG-EM conformance report, EAA accessibility statement, conformance crosswalk, methodology doc, deposition packet, defense and evidence bundles, pre-litigation and executive reports • Forensic anchoring — RFC-3161 trusted timestamp plus a server signature over the audit hash • Parallel scan, all-frames audit, design-system audit, custom rules • MCP server (not part of the $5 plan) • CLI runner (not part of the $5 plan) There is no free trial. ABOUT THE AI FEATURES AI checks are a paid feature, and they additionally require your own Anthropic API key — the cost is yours, billed by Anthropic, not by us. On the free tier the AI features are off even if you supply a key. When AI is enabled, the relevant page content — text, DOM snippets, colours, and screenshots — goes from your browser directly to Anthropic under your own account. We never receive it. WHAT YOU SHOULD KNOW BEFORE INSTALLING • Chrome will show a yellow "wcagcheckr started debugging this browser" banner while an audit runs. That is unavoidable: the Chrome DevTools Protocol is the only API that can force :hover, :focus and :active and read the full accessibility tree. It is what makes the multi-state audit possible. Nothing is inspected unless you start an audit. • wcagcheckr needs a connection. The audit engine itself runs locally, but the extension checks in with our licence server and will not run without a recent sync — on the free tier as well as paid. • It requests access to all sites because the site you audit is whichever one you choose at the time; no narrower permission can express that. It acts on a page only when you start an audit there. PRIVACY Audits, grading, baselines and report rendering all happen on your machine. Data leaves your device in these cases and no others: page content to Anthropic when you turn AI on with your own key; your licence token and a random device ID when you activate or validate a licence; the audited URL and a summary of findings to our server if you switch on scheduled-audit email or webhook alerts; the audit's hash, URL and capture time when you seal a record; and a random device ID when the extension checks for in-app messages. Crash reporting is off unless you opt in. There are no analytics or tracking SDKs in this extension. Full policy: https://wcagcheckr.com/privacy wcagcheckr is an auditing tool, not a law firm. Automated testing reaches a subset of WCAG — the absence of a violation in a report is not evidence of conformance, and no grade here is a certification, warranty, or guarantee of conformance with WCAG, the ADA, or any law. Nothing in it is legal advice, and no tool makes anyone immune from being sued. PART OF A SET OF THREE Three of the most expensive things a website can get wrong, checked one at a time: • ForensicConsent — trackers that fire before your visitors consent • HonestSiteAudit — marketing claims and dark patterns regulators scrutinize Each is free to start and works on its own.