Credits and licences
Last updated 2026-10-13
Our own code
The tools and page layouts are written for this site. The pages make no requests to other servers (when you give the HTML checkers a base URL, your browser loads that page’s own stylesheets and images from it).
Third-party material
The library and documents below are used under their own licences. axe-core is used exactly as published (not modified); its MPL-2.0 licence text is at /vendor/axe-core/LICENSE.
| Name | Used for | Licence |
|---|---|---|
| axe-core 4.13.0 (Deque Systems, Inc.) | The accessibility rules behind the website accessibility checker, the ADA compliance checker and the accessible-name check on the ARIA pages. The unmodified file is served from /vendor/axe-core/ with its licence and a SHA-256 checksum, and runs only inside your browser | MPL-2.0 (Mozilla Public License 2.0; source: github.com/dequelabs/axe-core). It bundles MIT-licensed parts listed in LICENSE-3RD-PARTY.txt next to the file |
| WCAG 2.2 and WAI-ARIA 1.2 (W3C) | Success criterion numbers, titles and levels, and ARIA role and attribute names in the checklists and references; the plain-language summaries are our own words | W3C Document License (copyright © World Wide Web Consortium) |