URL Format Checker

Scan pasted text for malformed URLs. This is a syntax check — it does not crawl live HTTP status codes.

Syntax check only — this tool does not crawl or verify HTTP status codes. It flags malformed URLs and common formatting issues in pasted text or HTML.

What this tool does

Malformed URLs in content break user trust and waste crawl budget — catch syntax errors before publish.

This regex-based checker scans pasted text locally — it does not crawl live sites.

How to use it

  1. 1

    Paste HTML, markdown, or plain text containing URLs.

  2. 2

    Review flagged malformed or suspicious link patterns.

  3. 3

    Fix broken syntax before publishing your page or email.

What it catches

Missing protocols, broken brackets, truncated URLs, and suspicious patterns in HTML href attributes.

For live 404 detection, use dedicated crawl tools after fixing syntax issues.

Tips

  • Run on CMS HTML export before major content launches.
  • Fix mailto: and tel: links in the same pass.

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Frequently asked questions

Does this crawl my website?▼

No. This is a syntax checker for pasted text — it does not fetch live URLs or crawl your site.

Is my content uploaded?▼

No. Link checking runs locally in your browser.