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CORS / Mixed Content Checker

Find HTTPS mixed-content warnings and CORS policy errors that block your API calls.

⚡ 199 points per successful run · Balance: 0 · Buy points

Mixed Content Scanner

Find HTTP resource references in the HTML and inline CSS of a public HTTPS page. This is a bounded heuristic, not a full browser crawl.

Only public HTTPS URLs are accepted. The page is fetched with certificate verification and a 512 KiB response limit.

Scan Results

Results will appear here.

About CORS / Mixed Content Checker

Find HTTPS mixed-content warnings and CORS policy errors that block your API calls.

How to use this tool

  1. Enter the requested data or choose an upload.
  2. Check the file type and size limit before submitting.
  3. Review the result, then download or copy it.
  4. Keep the original and use the actions above to continue safely.

Read the full CORS / Mixed Content Checker guide →