# Web Accessibility Checker

Traditional Chinese version: [https://accesserty.com/ai/products/web-accessibility-checker.md](https://accesserty.com/ai/products/web-accessibility-checker.md)

Check the page currently open in your browser with DevCheck, including localhost, staging and signed-in screens. Scan for machine-detectable issues, inspect affected elements, and test the task with a keyboard before re-testing fixes.

## Try a check and re-test the fix

No-code practice page: https://accesserty.com/en/devcheck-practice/ (fictional demo content; scan, apply the fix and re-test). You can also follow the button-name example at https://accesserty.com/en/web-accessibility-checker/#first-check. On an editable test page, choose Scan → Scan this page, inspect the button, add a visible name, then reload and scan the same state. AI is optional and not required. Continue with keyboard testing: https://accesserty.com/en/guides/keyboard-accessibility-testing/

## Why use a browser-based accessibility checker

An open menu or a form error can change both the content and the task. DevCheck checks the state open in your browser without requiring a public URL. Other pages and interaction states still need separate checks. Start with local scans and review tools; AI is not required. Test only pages you are authorized to use, and use a controlled environment for tasks that send orders or messages.

## What it checks

- Automated web accessibility checks related to WCAG 2 A, WCAG 2 AA, and best practices through axe-core.
- Machine-detectable issues mapped back to affected page elements for faster fixing and re-testing.
- Manual review aids for Focus Path, Heading Structure, Landmark Regions, image alt overview, and touch target size; orange hints require human confirmation and are not automatic failure decisions.
- Readability review with color vision, text spacing, visual field loss, presbyopia, myopia, and cataract simulations.
- Optional AI reviews descriptive link names, language marking and image alternatives in sampled content, not link destinations. Samples are sent to Google Gemini; human confirmation is still needed. Do not enable it on pages containing confidential or unauthorized content.
- A separate local PDF check inspects structure clues such as tags, images, links, form fields and bookmarks. Check document language in a PDF reader or editor’s document properties.

## Suitable workflows

- Preliminary checks by PMs, design, QA, engineering, content, and operations roles.
- Frontend development and component fixes.
- QA pre-release checks and regression testing.
- Design review and readability checks.
- Local, staging, authenticated, and interactive flow inspection.

## Pre-release workflow path

Use the following sequence to review a page. Skip checks for content, such as PDF files, that is not part of the task:

1. Start with release scope and the page state being checked.
2. Run automated checks and keep their limits visible.
3. Review keyboard focus path.
4. Review accessible names.
5. Review image alternatives.
6. Review color, states, and readability.
7. Inspect PDF structure signals when PDF files are part of the task.
8. Turn findings into a remediation plan and re-test.

## What should I check when choosing a free accessibility checker?

Check whether it can inspect your pages and interaction states, identify affected elements, explain its coverage, and let you record results and retest. Also check data transmission, usage limits, and conditions for optional features. Neither free nor paid means every evaluation is covered; complete tasks still need human review.

## Difference from online URL checkers

Public-URL tools are useful for starting with public pages. DevCheck runs in your current browser state, making local builds, staging pages, authenticated flows, open menus, and form errors available to inspect. Other tools may also support these contexts through authorized testing or browser automation; choose by actual capability, not category alone.

## Limitations

DevCheck helps people find common machine-detectable issues faster, but it is not an ADA compliance checker and cannot certify full WCAG, ADA, or legal compliance. Formal review still requires manual inspection, keyboard testing, assistive technology testing, and contextual judgment.

## Related pages

- [Web accessibility checker](https://accesserty.com/en/web-accessibility-checker/)
- [Accesserty DevCheck](https://accesserty.com/en/devcheck/)
- [Understand WCAG check results](https://accesserty.com/en/wcag-compliance-tool/)
- [PDF accessibility checker](https://accesserty.com/en/pdf-accessibility-checker/)
- [How to test website accessibility before launch](https://accesserty.com/en/guides/accessibility-testing-before-launch/)
- [Color Contrast Checks Before Release](https://accesserty.com/en/guides/color-contrast-checks-before-release/)
- [Automated accessibility checks](https://accesserty.com/en/guides/automated-accessibility-checks-limits/)
- [Chrome Web Store](https://chromewebstore.google.com/detail/accesserty-devcheck/ompbhahmipenipgiiiehbkiibkonoeec)
- [Firefox Add-ons](https://addons.mozilla.org/firefox/addon/accesserty-devcheck/)