Scan common ports on any IP address. Check if services are running and accessible — useful for network diagnostics.
Type an IP address (e.g. 192.168.1.1) or hostname (e.g. example.com) into the input field. The Port Scanner accepts both IPv4 addresses and domain names.
Select from common ports (HTTP, HTTPS, SSH, FTP, SMTP, DNS), well-known service ports, or specify a custom port range. Defaults cover the 20 most useful service ports.
Click "Start Scan". The tool probes each port using standard TCP connection attempts and reports whether each is open, closed, or filtered by a firewall. Scans usually complete in 5-15 seconds.
Each port shows its status (open/closed/filtered), the service name, and the typical use. Use this for legitimate network diagnostics, security audits of your own systems, or troubleshooting connectivity.
The Port Scanner is part of LaiUse's growing collection of network tools, ip lookup, dns, whois, ssl checker. Like every tool on LaiUse, it runs entirely in your browser — meaning your data, files, and inputs stay on your device throughout the entire process.
LaiUse offers Network tools alongside speed test, dns lookup, ipv4 calculator. The entire platform is free to use with no signup required, making it a popular choice for developers, designers, and everyday users who need a quick tool without the overhead of a SaaS subscription.
Whether you need the port scanner for a one-off task or as part of your regular workflow, LaiUse is designed to be fast, reliable, and private. Bookmark this page to come back anytime, or explore the rest of the Network category for related tools.
Yes. The Port Scanner is free to use without an account. Most LaiUse tools have no limits and run entirely in your browser; the Port Scanner runs the probe from LaiUse servers and is available to all users.
Port scanning is legal when performed on systems you own or have explicit written permission to test. Unauthorized scanning of third-party systems may violate computer-misuse laws (e.g. the US Computer Fraud and Abuse Act, the UK Computer Misuse Act, Singapore Computer Misuse Act). Always get permission first.
A filtered port means a firewall or network device is actively blocking the probe, so the scanner cannot determine whether the port is open or closed. This is normal and not necessarily a sign of a problem.
The Port Scanner currently supports IPv4 addresses and hostnames that resolve to IPv4. IPv6 scanning is on the request list — use the Request a Tool page to upvote it.