Random TCP/UDP Port Generator
Runs 100% in your browser — your files never leave your device.
Local services, test containers, and examples often need a plausible unused-looking port number. Set the minimum and maximum, then generate an unbiased cryptographically random integer inside that range. Availability still depends on your own machine.
How it works
- 1
Set the port range
- 2
Generate a random port
- 3
Copy and check availability locally
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