PortScannerLabs
PortScannerLabs is a free web tool for checking an IP address or domain for common open, closed, or filtered network ports and flagging risky exposures.
What PortScannerLabs is
PortScannerLabs is a free web tool for checking an IP address or domain for common open, closed, or filtered network ports and flagging risky exposures. Its default scan checks 12 common TCP ports, including SSH, Telnet, MySQL, RDP, HTTP, and HTTPS. For open ports, it uses nmap with service and version detection. Results distinguish port state from risk level, and risky findings link to guidance about the service and how to close it. Leave the target blank to scan your public IP as seen from outside your network. Scans with version detection can take up to 15 seconds. The cloud-based scanner needs no signup, account, or software installation. It is described for home and small-business users, IT administrators, developers, gamers, and self-hosters. You must confirm authorization before scanning a target other than your own connection. The site says it rate-limits scans, restricts anonymous full-range scans of arbitrary targets, and keeps only minimal technical logs needed to operate the tool and prevent abuse.
Good
- Checks 12 common TCP ports by default
- Uses nmap service and version detection
- Risky findings link to explanatory guides
- No signup or installation required
Watch out
- Anonymous users cannot run arbitrary full-range scans
- Version-detection scans can take up to 15 seconds
Who it suits
PortScannerLabs suits people who want to check common ports on an IP address or domain, including home users, small businesses, administrators, developers, gamers, and self-hosters. Users scanning targets beyond their own connection must be authorized.
Verdict
PortScannerLabs offers a free, browser-based check of common ports with risk guidance and no installation. Its default scope is limited, and authorization is required for targets beyond your own connection.
Plans and prices
From PortScannerLabs's own pricing page, checked 9 Oct 2026.
| Plan | Price | What it gives you |
|---|---|---|
| Free port scanner | Free | No signup · scans common TCP ports · full-range scanning of arbitrary targets restricted |
The facts
Each one read from PortScannerLabs's own pages, with the date it was checked.
What it does
- Abuse controls
- The site says it rate-limits scans and does not run aggressive full-range sweeps for anonymous users.checked 9 Oct 2026
- Access
- The scanner requires no signup, account, or software installation.checked 9 Oct 2026
- Authorization
- Users must confirm they are authorized before scanning a target other than their own connection.checked 9 Oct 2026
- Default target
- Leaving the target blank scans the user's public IP as seen from outside their network.checked 9 Oct 2026
- Intended users
- The site describes the tool for home and small-business users, IT administrators, developers, gamers, and self-hosters.checked 9 Oct 2026
- Ports checked
- The default scan checks 12 common TCP ports, including SSH, Telnet, MySQL, RDP, HTTP, and HTTPS.checked 9 Oct 2026
- Privacy
- The site says it keeps only minimal technical logs needed to run the tool and prevent abuse, and does not sell personal data.checked 9 Oct 2026
- Risk guidance
- Results separate port state from risk level, and risky findings link to guides explaining what the service is and how to close it.checked 9 Oct 2026
- Scan duration
- The site says scans can take up to 15 seconds with version detection.checked 9 Oct 2026
- Scanning engine
- The scanner uses nmap with service and version detection for open ports.checked 9 Oct 2026
- What it does
- PortScannerLabs scans an IP address or domain for common open, closed, or filtered network ports and flags risky exposures.checked 9 Oct 2026
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