PortScannerLabs

What PortScannerLabs is

PortScannerLabs is a free web-based scanner for checking an IP address or domain for common network ports and potential risky exposures. Its default scan covers 12 common TCP ports, including SSH, Telnet, MySQL, RDP, HTTP, and HTTPS. For open ports, the scanning engine uses nmap with service and version detection. Results distinguish each port's state—open, closed, or filtered—from its risk level, and risky findings link to guides 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 service requires no signup, account, or software installation. It is intended for home and small-business users, IT administrators, developers, gamers, and self-hosters. Before scanning a target other than your own connection, users must confirm they are authorized. PortScannerLabs says it rate-limits scans and restricts full-range scanning of arbitrary targets for anonymous users. It also says it keeps only minimal technical logs needed to operate the service and prevent abuse, and does not sell personal data.

Who it suits

PortScannerLabs suits home and small-business users, IT administrators, developers, gamers, and self-hosters who want to check common ports on an IP address or domain. It can also help users inspect their own public IP without installing software or creating an account.

Limits

The free scanner checks common TCP ports, and full-range scanning of arbitrary targets is restricted for anonymous users. Version detection scans can take up to 15 seconds.

Getting started

1. Open https://portscannerlabs.com/.
2. Enter an IP address or domain, or leave the target blank to scan your public IP.
3. Confirm authorization before scanning a target other than your own connection.
4. Run the scan and review port states, risk levels, and linked guidance.

Verdict

Choose PortScannerLabs for a quick, free check of common ports on an IP address or domain, with risk guidance and no account requirement. Look elsewhere if you need anonymous full-range scanning of arbitrary targets; this service restricts it.