Deque’s browser extension checks web accessibility, with a free automated scan and paid review features.
Freemium
Siteimprove Accessibility Checker
A browser extension for checking the accessibility of the page currently open, including authenticated pages.
About Siteimprove Accessibility Checker
Siteimprove Accessibility Checker is a free browser extension for checking the accessibility of the web page currently open in the browser. According to its homepage, it can check multi-step forms, dynamic content, and non-public pages, including password-protected pages. The homepage states that all analysis is done entirely within the browser. The extension highlights accessibility issues on the page and gives explanations of how each issue affects visitors, along with tips and recommendations.
The homepage does not say which accessibility standards the checks cover, and it does not state that results confirm legal compliance. The page also promotes other Siteimprove products, such as CMS plugins, connectors, and an API. These are separate from this extension and are not described in detail here.
Key features
- Checks multi-step forms, dynamic content, and non-public pages
- Works on password-protected pages
- Runs analysis entirely within the browser, per the homepage
- Highlights accessibility issues directly on the open page
- Explains how each issue affects visitors
- Provides tips and recommendations for addressing issues
Best for: People who need to check the accessibility of pages that are not publicly available, such as forms, dynamic content, or pages behind a login.
Good for
- Free to use, according to the homepage
- Can check password-protected pages, with analysis run in the browser
- Gives explanations of how issues affect visitors, not only issue flags
Siteimprove Accessibility Checker at a glance
- Category
- Development › Web Development
- Type
- Online tool
- Pricing
- Free
- Open source
- Not stated
- Last checked
- Oct 9, 2026 · Online when checked
- Listed
- Oct 9, 2026
Siteimprove Accessibility Checker alternatives
Tools and sites you could use instead, ranked by how closely they match.
A browser developer-tools extension for checking page accessibility and reviewing findings by element.
Free
Find and fix accessibility issues in websites with Accessibility Insights, including its browser extension.
A free browser accessibility toolbar with page checks and tools for inspecting visual and interaction issues.
Free
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Siteimprove Accessibility Checker FAQ
Can the extension check pages that require a login?
The homepage says the extension is compatible with password-protected pages and can check non-public pages for accessibility issues.
Where does the accessibility analysis run?
The homepage states that all analysis is done entirely within the browser.
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