Port Checker
NewLook up common port numbers for standard services and get the equivalent command-line tools to check port availability. Includes a comprehensive reference table of common ports (HTTP, HTTPS, SSH, MySQL, PostgreSQL, Redis, etc.) with quick-fill buttons.
Common Ports Reference
How to Use Port Checker
- 1Enter a hostname or IP
- 2Enter a port number (or click from the quick list)
- 3Click Check Port for command-line equivalents
Your Privacy is Protected
Port Checker runs entirely in your browser. Your files and data are never uploaded to any server, never stored, and never shared. Everything happens locally on your device using secure browser APIs.
No server uploadNo account required100% freeWorks on all devices
Frequently Asked Questions
Why can't it directly check ports?
Browsers cannot make raw TCP connections due to security policies. Direct port scanning requires command-line tools or a server-side proxy.
Why Use This Tool?
Files never leave your device
No upload to any server
Instant processing in browser
100% free, no account needed
Tags
port checkeropen portport scannernetwork portport test