Port Checker
Check if an HTTP or HTTPS endpoint responds on a port. Results update automatically with a short timeout.
Browser security rules only allow HTTP and HTTPS style checks. Raw TCP, UDP, and internal LAN scans are not available from client-side JavaScript.
About this tool
Port checks are useful for quick connectivity debugging when you need to confirm if an endpoint is answering on a specific web port. This tool runs lightweight browser requests and reports if the endpoint responded.
Checks HTTP and HTTPS endpoints directly
Auto-runs when host, port, or protocol changes
Shows latency and timestamp for each check
Clear messages for timeout and connection failures
Copy check summary in one click
Runs in your browser, no server-side port scanning is performed