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WCAG Testing Tool for A/AA Issue Review

Use DevCheck to organize axe-core findings related to WCAG A/AA and best practices, review severity, success-criterion clues, and affected elements, then fix and re-test.

What this WCAG compliance tool checks

DevCheck is not just a score. It locates automatically detectable issues on the page so the right person can fix and re-test them.


  • WCAG 2 A/AA related issues

    Scan the DOM with axe-core and organize violations related to WCAG A/AA and best practices.

  • Semantics, ARIA, and form labels

    Help identify common structure, interactive role, label, and accessible-name issues.

  • Visual and sensory simulation

    Simulate color vision differences, text spacing, reading difficulty, visual field loss, presbyopia, myopia, and cataracts.

  • AI semantic review

    Provide assistive suggestions for link purpose, language marking, and image alt text quality that rule-based checks often cannot judge, including suggested alt text improvements.

  • PDF structure signals

    Inspect signals such as tagged pages, language, images, links, form fields, bookmarks, and page size consistency.

How to run a WCAG check with DevCheck

The workflow stays inside the browser, which makes it practical for PMs, design, QA, engineering, content, and operations to run checks and re-tests at different stages.

  1. Step 1

    Install the browser extension (Chrome/Edge or Firefox).

  2. Step 2

    Open the page or product flow you want to inspect.

  3. Step 3

    Run the Axe-Core A11Y Test.

  4. Step 4

    Review WCAG, best-practice, and severity summaries.

  5. Step 5

    Select an issue to locate the affected element, then fix and re-test.


Install Chrome / Edge

Install Firefox

View the DevCheck product page

Automated checking is not a legal compliance guarantee

DevCheck helps people reviewing pages catch machine-detectable accessibility issues earlier, but no automated tool can fully certify WCAG, ADA, or legal compliance. Formal audits still require manual review, keyboard testing, assistive technology testing, and real-use judgment.

Who should use this tool?

  • PMs and product people

    Run a quick first check during acceptance, flow review, or issue reporting.

  • QA

    Add accessibility checks to regression workflows and reduce late discovery risk.

  • Designers and engineers

    Use simulation modes to review color, readability, and visual contexts, then use scan results to locate affected page elements.

Frequently asked questions

Is Accesserty DevCheck a free WCAG compliance checker?

DevCheck is available from the Chrome Web Store and Firefox Add-ons for automated accessibility scans, focus path review, simulation checks, AI semantic review, and PDF structure signal checks. Current availability and capabilities should be confirmed on the store listings.

Can DevCheck guarantee WCAG compliance?

No. DevCheck can detect many machine-testable issues, but full compliance still requires manual review, assistive technology testing, keyboard testing, and contextual judgment.

Which WCAG levels does DevCheck check?

DevCheck uses axe-core for page scans and runs automated checks related to WCAG 2 A, WCAG 2 AA, and best-practice rules.

Can it replace a manual accessibility audit?

No. DevCheck is useful for cross-functional first checks and fast regression checks, but formal audits should still include manual review and assistive technology testing.

Does DevCheck support PDF checks?

It supports PDF structure signal checks such as tagged pages, language, links, form fields, bookmarks, and page size consistency. This is based on PDF.js parsing and is not the same as full PDF/UA certification.