AI assesses every criterion with evidence — even the ones that needed human eyes.
Contrast, focus visibility, alt-text quality. The manual-review territory automated tools could never cover, assessed by AI from screenshots and the DOM, with the evidence shown. Checks the AI cannot judge are marked unverified — never counted as a pass. Audits run on our own AI capacity — no API key to bring. Every result comes with the failing code, line numbers, and a concrete fix, in a web report in English.
Evidence-backed assessments where automated tools go blind.
AI takes the first pass at the "manual review"
Automated tools can decide only 30–40% of the criteria. The remaining manual checks — alt-text adequacy, link purpose, layout breakage under zoom — are assessed by vision AI with evidence. What it cannot judge stays unverified; for a formal conformance claim, pair the results with human review.
No API key, no LLM bill
Judgment runs on our own vision-capable AI capacity. You never paste a key and there is no separate LLM invoice — one credit per page covers everything. See pricing →
Failing code, line numbers, fixes
For every failure you get the selector, the offending source code with line numbers, and a concrete fix. All 86 WCAG 2.2 success criteria and 105 checks, each with its evidence.
Audit a whole URL list at once
Multiple pages are audited together in isolated containers and merged into a single consolidated result. Viewing results is always free.
The European Accessibility Act has been enforced since June 2025. If you do business in the EU, EAA compliance means conforming to EN 301 549 — which builds on WCAG. a11y checker surfaces the gaps and gives you an evidence-backed audit trail for your EN 301 549 audit.
Web accessibility lawsuits under the ADA now exceed 4,000 per year, and the DOJ's Title II rule sets WCAG as the technical standard for state and local government websites. Courts and plaintiffs alike measure ADA website compliance against WCAG — the same criteria this tool audits in full.
Pricing
Pay as you go · AI includedOne page audit = one credit. Every account gets free credits each month; buy a pack when you need more. Paid credits never expire and the web report is always free to view.
Enough to try a few pages
free to view, forever
Prices in JPY, tax included; card payment via Stripe. A page that fails to audit is refunded automatically. Verdicts are AI-generated draft assessments, not a conformance certification.
Why we built it
MissionBug reports, feature requests, questions about your audit results — reach out any time by email or on social. Honest feedback helps more than anything.