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PortScannerLabs
What it is
PortScannerLabs is a free cloud-based web scanner for checking an IP address or domain for common open, closed, or filtered network ports. It flags risky exposures and separates port state from risk level, with links to guides explaining the service and how to close it. The scanning engine uses nmap with service and version detection for open ports. A default scan checks 12 common TCP ports, including SSH, Telnet, MySQL, RDP, HTTP, and HTTPS. Leaving the target blank scans your public IP as seen from outside your network. Scans with version detection can take up to 15 seconds. No account, signup, or installation is required. The tool is intended for home and small-business users, IT administrators, developers, gamers, and self-hosters. Users must confirm authorization before scanning another target. Rate limits apply, and anonymous users cannot perform unrestricted full-range scans.
For and against
For
- Free web access
- No signup or installation
- Service and version detection
- Risk guidance links
- Scans public IP by default
Against
- Default scan covers 12 TCP ports
- Full-range arbitrary scans are restricted
- Authorization required for other targets
- Scans can take up to 15 seconds
The verdict
PortScannerLabs offers a straightforward external view of common network ports and associated risks. Its limits on scan scope and authorization make it suited to controlled checks of systems you are allowed to scan.
Who it suits
It suits home users, small businesses, administrators, developers, gamers, and self-hosters checking internet-facing ports. It is useful when you want a quick scan without installing software or creating an account.
Plans and prices
Free port scanner
No signup · scans common TCP ports · full-range scanning of arbitrary targets restricted
Read 9 Oct 2026 · portscannerlabs.com
On the record
- Abuse controls
- The site says it rate-limits scans and does not run aggressive full-range sweeps for anonymous users.portscannerlabs.com · read 9 Oct 2026
- Access
- The scanner requires no signup, account, or software installation.portscannerlabs.com · read 9 Oct 2026
- Authorization
- Users must confirm they are authorized before scanning a target other than their own connection.portscannerlabs.com · read 9 Oct 2026
- Default target
- Leaving the target blank scans the user's public IP as seen from outside their network.portscannerlabs.com · read 9 Oct 2026
- Intended users
- The site describes the tool for home and small-business users, IT administrators, developers, gamers, and self-hosters.portscannerlabs.com · read 9 Oct 2026
- Ports checked
- The default scan checks 12 common TCP ports, including SSH, Telnet, MySQL, RDP, HTTP, and HTTPS.portscannerlabs.com · read 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.portscannerlabs.com · read 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.portscannerlabs.com · read 9 Oct 2026
- Scan duration
- The site says scans can take up to 15 seconds with version detection.portscannerlabs.com · read 9 Oct 2026
- Scanning engine
- The scanner uses nmap with service and version detection for open ports.portscannerlabs.com · read 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.portscannerlabs.com · read 9 Oct 2026
