a11yTools for Safari
Collection of HTML accessibility testing utilities and guidance from Paul J. Adam, including Safari-oriented tooling.
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Browser Extensions
28 tools in this category.
Accessibility Insights for Web
Open-source browser extension with fast automated checks plus guided assessments for keyboard, tab stops, and manual WCAG tests.
Accessible Name & Description Inspector (ANDI help home)
Official ANDI project home explaining installation and use of the SSA accessibility inspection bookmarklet.
Accessible Web Helper
Browser helper that highlights accessibility issues and connects into Accessible Web's RAMP auditing workflow for deeper remediation.
ANDI
Bookmarklet (favelet) that inspects accessible names and descriptions of interactive controls and surfaces practical remediation tips.
ARC Toolkit
Free on-demand page testing extension from TPGi for inspecting accessibility issues directly in Chrome or Firefox.
ARIA DevTools
Extension that presents the page according to ARIA roles so you can see how assistive tech may interpret structure, names, and landmarks.
axe DevTools for Web
Browser extension and DevTools panel that runs axe-core checks on the page you are viewing, with a free tier and paid guided-testing features.
axe DevTools for Web (Firefox)
Firefox add-on edition of axe DevTools for running automated accessibility scans inside the browser.
Chrome DevTools Accessibility pane
Built-in Chrome DevTools Accessibility panel for inspecting the accessibility tree, ARIA attributes, and related properties.
CKEditor Accessibility Checker
CKEditor addon that helps content authors find and fix accessibility issues while editing rich text.
Editoria11y
Content-focused accessibility checker designed for authors inside Drupal and similar CMS editing experiences.
Equal Access Checker (Firefox)
Firefox add-on for IBM Equal Access automated accessibility scanning of web applications.
Firefox Accessibility Inspector
Built-in Firefox DevTools panel for viewing the accessibility tree and checking contrast and keyboard issues.
HeadingsMap
Extension that maps heading levels on a page so you can verify document outline structure for screen-reader navigation.
IBM Equal Access Accessibility Checker
Open-source browser extension that uses IBM's rule engine to find accessibility issues and help developers locate them in the page source.
Landmark Navigation
Keyboard-driven landmark navigator that helps verify ARIA and HTML landmark regions on a page.
Microsoft Accessibility Insights Chrome
Chrome Web Store listing for Accessibility Insights for Web.
Polypane Accessibility Panel
Accessibility tools built into the Polypane browser for designers and developers, including contrast and issue overview.
Sa11y
Lightweight checker aimed at content authors that highlights common accessibility problems on a page with plain-language fix tips.
Silktide Accessibility Checker
Browser extension that flags accessibility issues on a page and offers step-by-step guidance and simulation helpers for editors and developers.
Siteimprove Accessibility Checker
Free browser extension for checking the current page, including dynamic and password-protected views, with issue highlighting in the browser.
Siteimprove Checker Chrome
Chrome Web Store listing for the Siteimprove Accessibility Checker.
taba11y
Chrome and Firefox extension that visualizes the keyboard tab order so you can spot missing or illogical focus sequences.
TinyMCE a11ychecker
TinyMCE premium plugin that checks content accessibility as authors write in the editor.
WAVE Evaluation Tool
Browser extension that overlays icons on a page to show accessibility errors, alerts, structure, and contrast so you can review issues in context.
WAVE for Firefox
Firefox edition of WAVE that injects accessibility indicators into the page you are reviewing.
WebYes Accessibility Checker
Chrome-oriented accessibility checker that highlights issues on the page and pairs with WebYes site-audit products.