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Random Port Generator

Generate random TCP/UDP port numbers from well-known, registered, or dynamic ranges. Useful for network testing, Docker port mapping, and firewall configuration. Code never leaves your device — formatting and validation run locally in your browser.

100% Local Browser Native

How to Use the Random Port Generator

1. Set options

Adjust the settings for Random Port first.

2. Generate

Create your Random Port with one click.

3. Copy and reuse

Copy what you need; rerun for a fresh batch.

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Frequently Asked Questions

What port ranges can I generate from?

Well-known (0-1023), registered (1024-49151), dynamic/private (49152-65535), or any combination of these ranges.

Can I exclude specific ports?

Yes. You can specify ports to exclude (e.g., 80, 443, 3000) to avoid conflicts with commonly used services.

How many ports can I generate at once?

You can generate 1 to 100 random ports in a single batch. Results are displayed as a list you can copy.

Are the generated ports guaranteed to be available?

No. The tool generates random port numbers, but it cannot check if ports are currently in use on your system. Use a port scanner for that.

Can I filter by TCP or UDP?

Yes. You can generate ports specifically for TCP, UDP, or both protocols.

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Last updated October 2026