HTML Accessibility Quick Checker

Paste HTML for a quick static accessibility review; the result is not a full WCAG conformance audit or assistive-technology test.

HTML document

0Total findings

0Errors

0Warnings

StaticCheck scope

Quick static reviewA clean result is not WCAG conformance. Color contrast, keyboard behavior, dynamic states, focus management, screen-reader output, and user testing require broader evaluation.

Source & result review

Inspect what the browser parsed and what the tool produced

DOMParser ≠ sanitizer

Ready to inspect source and result.

Review is local and detached: this panel never inserts pasted markup into the live page. A browser parser can normalize malformed HTML, but successful parsing does not make markup safe to inject. Scripts, inline event attributes and embedded browsing/plugin elements are reported as active-content signals, not executed.

Browser-local does not mean standards-complete

HTML parsing is error tolerant. Source diagnostics, sandboxed previews, and transformations do not replace full conformance, security, or production-browser testing.

Quick accessibility checks are only a starting point

The native checker covers common static issues such as image alt text, labels, accessible names, heading order, language/title signals, duplicate IDs and positive tabindex. The markup review adds structure and active-content context; neither result is a WCAG conformance claim.

Parser and sanitizer boundary

HTML DOMParser creates a detached document and may repair or normalize markup. That is useful for inspection, but parsing alone does not sanitize untrusted HTML. Review scripts, inline event attributes, embedded content and application-specific URL/context rules before any live-DOM insertion.