OpenWebmasterby Mello Zone

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HTML quality · source-only technical audit

Check deprecated HTML, inline CSS, embeds, metadata, and social tags

Paste a real page source or upload an HTML file to review the kind of markup issues found in paid audits: obsolete tags, inline event handlers, iframe gaps, image attributes, metadata essentials, JSON-LD validity, and minification hints.

INPUT1,000,000 CHARSFINDINGS500 SHOWNRENDERINGNOT CLAIMED
PAGE SOURCE CHECKER

Audit the HTML you actually plan to publish

Everything runs in this browser. OpenWebmaster does not upload your source or invent a score from a sample page.

Use exported source from a CMS, staging build, view-source result, or crawler. Live response headers, cache lifetime, gzip/Brotli, and rendered JavaScript require separate tools.

The checker reads source markup only. It does not run JavaScript, follow redirects, download linked resources, or decide whether a design is visually correct.

HTML

Ready for real source.

No sample audit, artificial score, fake issue count, rendering result, cache verdict, or ranking claim appears before you supply HTML.

Production review practice

Pair source checks with live delivery evidence

Clean up obsolete markup first

Deprecated tags, inline handlers, and plugin-era embeds are easier to fix before you chase fine-grained performance work.

Keep previews factual

Open Graph, X cards, and JSON-LD should describe the real page. Do not generate fake reviews, fake credentials, or unrelated imagery.

Verify deployed behavior

After source cleanup, inspect response headers, cache directives, compression, render-blocking resources, and PageSpeed evidence separately.

Minify source assetsInspect page resourcesValidate JSON-LDCheck headers