Free LaTeX Accessibility Checker: WCAG 2.1 AA

This online tool provides a free accessibility report for LaTeX documents, ensuring compliance with WCAG 2.1 AA and ADA Title II standards. Simply upload your LaTeX template, class, project file (.zip), or even a compiled PDF, and receive a detailed report on its accessibility. The checker analyzes key aspects such as:

• PDF Tagging: whether your LaTeX will produce (or your PDF already has) a tag tree of headings, lists, tables, and figures. This is the single biggest WCAG 2.1 AA failure point for LaTeX documents. In current LaTeX this comes from \DocumentMetadata{tagging=on} on TeX Live 2025 or newer, compiled with LuaLaTeX.

• Critical Alt Text, Language & Title: alternative text on meaningful images via \includegraphics[alt=...], a declared document language in \DocumentMetadata, and a real \title plus hyperref metadata. These three account for most of the real-world failures the checker finds.

• Math Accessibility: whether your equations are exposed as MathML (navigable by screen readers like NVDA+MathCAT and JAWS) or just rendered as a flat, unreadable image. This is the hardest part of STEM accessibility and is checked against PDF/UA-2 requirements. Add tagging-setup={math/setup=mathml-SE} to get equations tagged properly.

• STEM Package Compatibility: whether packages loaded in your preamble are known to break tagging. titlesec is the most common offender; beamer (for slide decks) is another. Older university thesis classes and journal templates often load these without you realizing it, which is why a document can look fine and still fail WCAG 2.1 AA. The checker reads your preamble against published tagging-compatibility data and names the specific package that's blocking you.

The report breaks down the readiness score by category and indicates who is responsible for making fixes: the template developer, the compile setup, or the author. While this automated tool provides a readiness assessment, it honestly notes what requires human review, such as alt-text quality and screen-reader testing.

This service is ideal for academics, researchers, and anyone preparing documents for publication or submission, especially those requiring adherence to accessibility standards. The tool is designed to be straightforward, requiring no signup and immediately discarding your file after analysis, keeping only the report briefly.

Key features include:

• Free online analysis

• No signup required

• Supports .tex, .cls, .sty, .zip, and .pdf files

• Detailed report with actionable insights

• Focus on WCAG 2.1 AA, ADA Title II, and PDF/UA standards

TheLaTeXLab also offers services for University LaTeX Thesis Template fix for ADA Title II & WCAG 2.1 AA Compliance