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Sa11y review

Free#86 of 129 in Website Accessibility Tools

A free, open-source page checker for CMS teams that need practical accessibility guidance.

3.0/10Editor score
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Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026

Sa11y is a free, open-source JavaScript accessibility checker for content authors and CMS teams. It runs in the browser, automatically checking page content as it loads and highlighting accessibility and usability issues directly on the page. The tool covers more than 80 checks across headings, links, images, contrast, page structure, forms, embedded content, and other content-quality concerns. It is available as a JavaScript plugin, CMS integration, or bookmarklet, making it suited to teams that review pages during content creation rather than centralize large-scale scanning operations.

The published Free plan includes the open-source checker, more than 80 accessibility checks, and browser-based operation. Its review features extend beyond issue detection: visual annotations include remediation guidance, while heading outline and image review panels support focused content checks. Contrast checking, colour filters, readability scoring, configurable checks, custom exclusions, and CSV or HTML exports add flexibility for editorial workflows. Open Shadow DOM and web-component checking also support pages that use those structures.

Sa11y fits teams working in WordPress, Joomla, Drupal, Pressbooks, or Adobe Experience Manager, with integrations that place page checks closer to existing CMS workflows. Its scope is page-focused and its stated coverage is WCAG 2.1, so organizations seeking CI/CD or API-based accessibility processes should consider a broader platform instead. Choose Sa11y when content authors need free, open-source checks with visible guidance and export options; choose an alternative when accessibility monitoring must extend beyond individual pages or into automated delivery pipelines.

Sa11y pros and cons

  • Where it wins
    • More than 80 accessibility and usability checks run in the browser
    • Visual annotations provide guidance for resolving page issues
    • Integrates with WordPress, Joomla, Drupal, Pressbooks, and AEM
  • Where it doesn't
    • Page-focused scope does not cover broader automated delivery workflows
    • Coverage is specified for WCAG 2.1 rather than newer WCAG versions
    • No browser extension is provided

Sa11y fact sheet, pricing and score →

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