5 Best Section 508 Compliance Testing Tools (2026)

How We Evaluated

We looked at each tool through the lens of a government contractor or agency developer responsible for delivering Section 508-compliant websites. The criteria: does it produce documentation government auditors accept? Does it cover the testing scenarios agencies require? And does it fit the budget of a small-to-mid-size contractor shop?

We weighted compliance reporting heavily because 508 compliance is a documentation problem as much as a technical one. Finding violations is useful. Producing a report that documents what was tested, what was found, and what was remediated is what agencies and contracting officers need.

Web vs Document Compliance

Section 508 covers both web content and documents. Most web accessibility tools — including A11yProof, axe DevTools, and ANDI — test web pages only. PDF compliance requires separate tooling.

If your agency work involves producing PDFs, slide decks, or other electronic documents, include PAC in your testing workflow alongside your web scanner of choice. A perfectly accessible website that ships inaccessible PDF reports fails 508 compliance.

ANDI’s Role in Agency Workflows

ANDI (Accessible Name and Description Inspector) is not the most powerful tool on this list, but its government lineage matters. SSA developed it specifically for Section 508 testing, and some agency testing procedures reference it by name. If you work with federal agencies, confirm whether their testing standards require ANDI before deciding to skip it.

For most projects, ANDI works best as a supplemental tool alongside broader scanning. It excels at validating ARIA attributes and keyboard focus behavior — areas where its element-by-element inspection provides more detail than automated scanners.

Choosing Between A11yProof and axe DevTools for 508 Work

The practical difference is fix guidance versus testing depth. axe DevTools gives developers tight integration with their coding workflow — test while you build, catch issues before they reach the site. A11yProof scans the finished site, generates a compliance report, and produces AI-suggested code fixes for what it finds.

For contract shops with small development teams, A11yProof’s fix suggestions reduce the accessibility expertise required to remediate violations. Instead of researching WCAG remediation guidance, developers get specific code changes to implement. For larger teams with dedicated accessibility practitioners, axe DevTools’ depth and CI integration may be the better fit.