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web validator

URL List Validator

Validate lists of URLs for proper formatting, http/https scheme, and duplicates.

Results

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Status
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Details
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Total URLs
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Unique URLs
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Issues
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Rules & checks

Validates each line as an http/https URL.

Flags invalid URLs and duplicate entries.

Runs entirely client-side; no data is stored.

When to use it

  • QA link lists before crawling or sharing
  • Support teams checking user-provided URLs
  • Preflight CSV or bulk imports of URLs

Tips

  • Keep one URL per line
  • Use absolute URLs with http/https schemes

Examples

Valid list

  • https://example.com/
  • https://example.com/about

Duplicate

  • https://example.com/
  • https://example.com/ -> flagged duplicate

Invalid

  • not-a-url -> flagged invalid

FAQs

Do you fetch the URLs?
No. This checks format only and runs locally.

Related validators

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URL Validator

Validate HTTP/HTTPS URLs locally—parse host/path and catch malformed links before publishing or sending to APIs.

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robots.txt Validator

Validate robots.txt syntax, user-agents, and allow/disallow rules locally.

Format and duplicate check only; does not fetch or verify status codes.