Accessibility Checker

Audit pasted HTML for common accessibility issues — missing alt text, unlabeled form inputs, heading hierarchy skips, missing lang attribute, ARIA misuse, non-semantic markup, and unreachable links — entirely client-side.

13pxHTML

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Paste some HTML or load an example above, then click Check to audit it.

Heuristic, client-side DOM checks only — it complements but does not replace a full WCAG audit or dedicated tools like axe or Lighthouse. Nothing you paste here is transmitted over the network.

Accessibility Checker

Audit pasted HTML for common accessibility issues — missing alt text, unlabeled form inputs, heading hierarchy skips, missing lang attribute, ARIA misuse, non-semantic markup, and unreachable links — entirely client-side.

Common uses

  • Check a page for missing image alt text
  • Find form inputs without labels
  • Detect heading hierarchy skips and invalid ARIA roles

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  • wcag html checker
  • axe alternative online
  • invalid aria role finder

Frequently asked questions

How do I check my HTML for accessibility issues?

Paste the markup into the Accessibility Checker to get a list of problems like missing alt text, unlabeled inputs, heading skips and ARIA misuse.

Does it test full WCAG conformance?

No. It audits for common issues in pasted HTML only, so also test with real assistive tech.

Can it find a missing lang attribute?

Yes, a missing lang attribute is one of the checks.

Can I check a live URL?

The tool audits HTML you paste in, rather than fetching a page.

Is my data uploaded to a server?

No. This tool runs entirely in your browser — your input is processed locally on your device and is never uploaded or stored on a server.