A11yprobe

a11yProbe — Accessibility Scanner That Goes Beyond the Basics

Most accessibility tools stop at surface-level checks — missing alt text, empty links, low contrast. a11yProbe goes deeper. It probes the structural architecture of your page to find the problems that other scanners miss.

What makes a11yProbe different:

->Structural analysis — detects heading level skips, orphaned content outside landmarks, broken document outlines, and missing page regions
->Keyboard architecture audit — finds focus traps, unreachable interactive elements, broken tab sequences, and widgets with click handlers but no keyboard support
->ARIA deep validation — catches conflicting roles, orphaned references, invalid state values, and role/element mismatches
->Behavioral testing — simulates real keyboard interaction to catch focus traps and unexpected context changes that static analysis cannot detect
->Smart false-positive suppression — filters known false-positive patterns so you focus on real issues, not noise
->Cross-engine deduplication — runs multiple scanning engines and shows each issue once, not repeated across scanners

Built-in tools:

->Screen reader simulator — experience your page the way JAWS/NVDA users do
->Tab order visualization — see the keyboard navigation sequence at a glance
->Contrast checker — hover any text for live contrast ratios
->Heading tree, landmark map, reading order, and focus issue overlays
->Behavioral test runner — automated keyboard and focus interaction tests
->PDF report generation with WCAG conformance mapping and legal compliance assessment

Privacy first:

All scanning runs entirely in your browser. No data is sent to any server. No analytics, no tracking, no account required.

Open source under the MIT license.