CORS Header Tester
NetTool
Test CORS (Cross-Origin Resource Sharing) headers of any URL. Debug CORS issues.Updated 2026-03-11
Enter a URL to test CORS headers...
Ctrl+Enter Run Ctrl+Shift+C Copy output
How to Use
- Enter domain, IP, or URL to check
- Click Lookup or press Enter
- Check status indicators
- Review detailed results
FAQ
Why differ from other tools?
Different tools query different servers or use different methods. We show raw responses.
What protocols are checked?
Depends on the tool — DNS, HTTP, HTTPS, WHOIS, and other standard protocols.
Is my query logged?
No. Queries processed in real time and not stored.
How accurate are results?
Queries authoritative sources in real time. Results reflect current network state.
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