Port Scanner Tool
This tool checks if common ports on your network are open or blocked.
Idle. Ready to run the scan.
Scan Progress
What This Tool Does
This tool checks whether common ports on your network appear open or blocked by your router or firewall.
Runs in Your Browser
No installs required — this test runs entirely in your browser using timed connection attempts.
Quick Start
- Click Start Port Scan.
- Wait for the scan to complete.
- Review which ports are open or blocked.
How It Works
- The tool attempts to connect to common ports.
- If the request succeeds, the port is considered open.
- If it fails, the port is likely blocked by your firewall or router.
What the Results Mean
- Safe — No common ports open.
- Warning — Some ports open; verify they are intentional.
- Risk — Multiple ports open; potential security exposure.
Troubleshooting
- Restart your router.
- Disable VPNs or proxies.
- Check router firewall settings.
- Contact your ISP if unexpected ports are open.
Tips & Notes
- Browser‑based port scans are approximate.
- Some networks intentionally block ports for security.
- Corporate networks often use strict firewall rules.
Related Tools
- Firewall Status Check Tool
- Ping Test Tool
- Packet Loss Test Tool
FAQ
Can this scan my local device?
No — browsers cannot scan local inbound ports.
Why are some ports open?
Router settings, ISP rules, or exposed services.
Does this work on mobile?
Yes — mobile browsers support this test.