AI gives a verdict on every criterion — even the ones that needed human eyes.
Contrast, focus visibility, alt-text quality. The manual-review territory automated tools could never cover, judged definitively by AI from screenshots and the DOM. Audits run on your own API key (BYOK) — the key is never stored anywhere. Every result comes with the failing code, line numbers, and a concrete fix, in a web report in English.
Definitive verdicts where automated tools go blind.
AI replaces 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 judged definitively by vision AI.
Your key, your control, low cost
LLM costs are billed directly to your own key. Bring a Gemini, GPT, or Claude API key: requests go straight to the provider and the key is never stored anywhere. Gemini even works on the Google AI Studio free tier. How to get an API key for free →
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
Completely free · Public betaAudits and web reports are all free. AI usage is BYOK (your own API key), so there is nothing else to pay us. Ever.
with failing code and fixes
$0 with Gemini free tier or OpenAI data sharing
As a public beta, limits and specifications may change without notice. To keep the service sustainable, audits are currently capped at 5 per month.
Why we give it away
MissionBug reports, feature requests, questions about your audit results — reach out any time by email or on social. This is a public beta run to validate real needs, so honest feedback helps more than anything. And if the tool has been useful, a coffee's worth of support is always appreciated.