Random Port Generator Online - Generate an Unprivileged Port
Generate one random TCP or UDP port number from the unprivileged range 1024 through 65535.
About this tool
The tool reads a browser cryptographic random 16-bit value and maps it into the inclusive unprivileged port range.
How to use
- Enter the value in the format described by the tool.
- Run the conversion or calculation in your browser.
- Review and copy the generated result.
Features
- Generates one port per run.
- Uses browser crypto randomness.
- Restricts output to 1024-65535.
Common use cases
- Choose a candidate local development port.
- Create randomized test configuration.
- Avoid repeatedly picking familiar port numbers.
Common issues and tips
- A generated port may already be occupied or reserved by an application.
- Random selection does not check the current device or remote firewall.
Privacy
Processing runs locally in your browser. Input is not uploaded to Tools12345.
Frequently asked questions
What range is used?
1024 through 65535 inclusive.
Does it verify that the port is free?
No.
Can the number be used for TCP and UDP?
It is a valid numeric candidate for either protocol.