Siteimprove Accessibility Checker - Browser Extension

Modified on: Mon, 18 May, 2026 at 6:56 PM

Summary

The Siteimprove Accessibility Checker browser extension is a free tool that scans web pages for accessibility issues in real time using the same engine as the Siteimprove platform, providing issue locations, explanations, code examples, and recommended fixes directly within the browser.

Overview

The Siteimprove Accessibility Checker is designed to help users quickly identify and understand accessibility issues on any webpage without needing to publish content or grant access to external systems. It runs entirely within the browser, allowing secure testing of protected or dynamic content.

What is the Siteimprove Accessibility Checker?

The Siteimprove Accessibility Checker is a free tool available as a Browser Extension to check any webpage for accessibility issues at any given time. The Siteimprove Accessibility Checker uses the same checking engine as the Siteimprove Accessibility platform product. It provides:

An immediate overview of your page's accessibility issues
Location of where the issue appears on the page
Clear explanation of how they affect your users
Code examples
Specific recommendations on how to fix issues, including links to the relevant WCAG techniques

All analysis is done entirely within the browser, allowing secure evaluation of password-protected or non-public pages, multi-step forms, and dynamic content.

Limitations

Note: The Siteimprove Accessibility extension can be used on HTML web page content. It is not possible to check PDF content with this extension.

Benefits for existing Siteimprove Accessibility customers

Benefits for existing Siteimprove accessibility customers

Check pages directly in your browser without giving anyone access to the content of the tested page (e.g. during development)

Check pages that require a login (e.g. intranets or other firewall-protected pages) on the fly, anytime

Check page stages and content that is only activated on user input (e.g. multi-step forms)

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