Free Online Port Scanner
NetTool
Check if common ports are open on a given hostUpdated 2026-03-11
🔌 This tool queries public APIs. Some lookups may be limited by CORS or rate limits. For comprehensive results, try command-line tools like nslookup, dig, or curl.
Frequently Asked Questions
Is this tool free to use?
Yes, completely free. All processing happens in your browser — no data is sent to any server.
Do I need to create an account?
No account or signup required. Just open the tool and start using it immediately.
Is my data safe?
Yes. Everything runs locally in your browser. Your data never leaves your device.
How to Use
- Enter domain, IP, or URL to check
- Use troubleshooting tips
- Check status indicators
- Review detailed results
FAQ
Can I check any domain?
Yes, any publicly accessible domain or IP. Private addresses are not reachable.
Is my query logged?
No. Queries processed in real time and not stored.
How often should I check?
After DNS changes, wait 24-48h for propagation then verify. Monitor weekly for changes.
Why differ from other tools?
Different tools query different servers or use different methods. We show raw responses.
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