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Accessibility Visualizer

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Free

Free

MIT-licensed browser extension

Every plan, in full

On the record

Available browsers
The maker links to Chrome Web Store and Firefox Add-ons; the Firefox listing says the add-on is also available in Firefox for Android.ymrl.github.io · read 12 Oct 2026
Browser extension
Yesymrl.github.io · read 22 Sep 2026
Customization
Users can switch among presets, select which information to display, and save different settings for each domain.ymrl.github.io · read 12 Oct 2026
Integrations
The guide lists axe DevTools, WAVE, and Lighthouse as tools it can be used alongside.ymrl.github.io · read 12 Oct 2026
Intended users
The maker describes the goal as helping people notice accessibility while coding or checking web page behavior, without first needing to inspect the accessibility tree or source code.ymrl.github.io · read 12 Oct 2026
Issue detection
The extension displays warning and error messages for problematic states and states that should be used with caution.ymrl.github.io · read 12 Oct 2026
Live regions
It can visually show changes in live regions, including those using role=status, role=alert, role=log, aria-live, and output elements.ymrl.github.io · read 12 Oct 2026
Open source
The project is released under the MIT License, and its source code is publicly available.github.com · read 12 Oct 2026
Performance and display limits
The guide notes that some sites may slow down, frames or Shadow DOM may prevent overlays from appearing, and interactive mode may interfere with mouse operations.ymrl.github.io · read 12 Oct 2026
Privacy
The privacy policy says the extension does not collect, store, or transmit personal or browsing data and processes information locally in the browser.github.com · read 12 Oct 2026
Product
Accessibility Visualizer is a browser extension that overlays accessibility information on web pages.ymrl.github.io · read 12 Oct 2026
Scan scope
pageymrl.github.io · read 22 Sep 2026
Settings storage
The extension may store preferences using browser storage; browser sync may synchronize them under the user's account, with the browser vendor handling that process.github.com · read 12 Oct 2026
Verification limit
The guide says the extension's information is supplementary and recommends checking with actual assistive technologies such as screen readers.ymrl.github.io · read 12 Oct 2026
Visualized information
It can display image alternative text, heading levels, form labels, table structure, lists, language attributes, and WAI-ARIA information.ymrl.github.io · read 12 Oct 2026

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