♿ Web Page QA & Accessibility Preflight

Run one bounded offline pipeline across HTML structure, accessibility, metadata, links, and pasted response headers. No URL is fetched and a clean report is not a certification.

HTML (200 KB and 10,000 nodes maximum)

<!doctype html>
<html>
<head><title></title></head>
<body>
  <h1>Checkout</h1>
  <img src="hero.jpg">
  <label>Email</label><input id="email">
  <button></button>
</body>
</html>

Optional response headers (32 KB maximum)

content-security-policy: default-src 'self'
x-content-type-options: nosniff
referrer-policy: strict-origin-when-cross-origin

What this preflight checks

Document language and title, image alternatives, form labels, unique IDs, link and button names, table headers, and a main landmark. Findings use stable rule IDs with selector hints, evidence, and remediation.

Passing this preflight does not prove WCAG conformance. Keyboard behavior, focus order, color contrast, semantics after JavaScript runs, zoom/reflow, captions, and real assistive-technology behavior still require testing.

Runs in your browser

Pasted HTML and response headers stay in this browser tab and are never uploaded or fetched. Review copied reports because evidence may include private element IDs or snippets.

Include current input in shared/debug payload

What this tool does

Web Page QA composes bounded HTML, accessibility, metadata, link, and pasted-response-header diagnostics into one deterministic offline report.

Why it is useful

It catches common page-quality defects early without fetching a URL or splitting the same review across five tools.

Five bounded domains

The report separates HTML, accessibility, metadata, links, and headers with stable typed codes and actionable remediation.

Limits

It cannot evaluate rendered contrast, keyboard interaction, focus order, runtime JavaScript, real network behavior, or assistive-technology usability.

Privacy note

All parsing and analysis runs locally in your browser; no URL is requested.

Important limitation

Do not use a clean report as an accessibility, security, SEO, or legal-compliance certification.

Quick answers

Does this fetch my website?

No. It checks only HTML and response-header text you paste.

Does it certify WCAG compliance?

No. Accessibility checks are an early structural preflight only.

Common Use Cases

Review a component sample

Paste rendered component HTML and catch missing names, labels, or image alternatives.

Preflight a static page

Check document language, title, landmarks, IDs, and basic table structure before manual review.

View all in Developer →