Port Checker
Check if a specific TCP/UDP port is open on a target server.
Runs entirely in your browser - your files are never uploaded
What is Port Checker?
Port Checker is a free, web-based utility designed for instant, local network tools tasks. It allows users to compute, format, convert, or edit data directly in their browser without installing software or registering an account.
- 100% Free & Unlimited Usage
- 0% File Uploads (100% Client-Side Privacy)
- Instant Real-Time Calculations
- Mobile, Tablet & Desktop Compatible
How to use Port Checker
Select or Enter Input
Provide your source file or type your values into Port Checker.
Configure Settings
Adjust parameters, formatting options, or units in real-time.
Get Instant Output
Download the final processed file or copy the generated output.
About the Port Checker
Test port reachability and firewall status on any server or domain. Check standard service ports or specify custom port numbers.
Provides clear status reports (Open, Closed, or Filtered/Timeout) along with descriptions of common server services.
Frequently asked questions
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