A
AiTechWorlds
AiTechWorlds
Paste a page's HTML to extract and validate its canonical tag against the page URL.
Self-referencing canonical — correct for most pages
https://www.aitechworlds.com/tech-articles/sourdough-bread-guide
100% in-browser — parses the HTML you paste with a regex for <link rel="canonical">. It does not fetch any URL itself, so there's no CORS restriction and no data leaves your device.
Canonical URL Checker parses HTML you paste for <link rel="canonical"> tags, flags missing or duplicate canonicals, and checks whether the canonical is self-referencing (matches the page's own URL) or points elsewhere.
Enter the page URL you're checking
Used for the self-reference comparison.
Paste the page's HTML source
View Source or Inspect → copy the <head> section.
Read the validation result
Missing, duplicate, self-referencing, or pointing elsewhere.
100% Private — No Server Required
All processing happens directly in your browser. No data is uploaded, stored, or transmitted to any server.
Last reviewed on July 24, 2026 by the AiTechWorlds Tools Team. All processing runs locally in your browser.
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