# Random Port Generator

URL: https://phishdestroy.io/developer-tools/random-port-generator
Category: General dev
Where it runs: Runs locally (nothing you enter is uploaded)

Pick random port numbers for a development server, a test container or a firewall rule, inside a range you choose.

## Example input

IANA dynamic range

```
49152
```

Five distinct ports between 49152 and 65535, the range IANA sets aside for dynamic and private use.

## FAQ

### Does it check whether a port is free?

No. A web page cannot see which ports are open on your machine, so the numbers are only random picks. Check with ss -ltn on Linux, lsof -i -P on macOS or netstat -ano on Windows before you bind one.

### Which range should I use?

Ports below 1024 are well-known service ports, and on Linux binding to them needs root or a special capability, so the default skips them. 49152–65535 is the IANA dynamic and private range with no registered services, but operating systems also take outgoing ports from high ranges (Linux: 32768–60999), so check that the port is free.

### Is anything sent or scanned?

No. The numbers come from crypto.getRandomValues in your browser; no port is probed and nothing is uploaded.

## Related tools

- [Common Ports Reference](https://phishdestroy.io/developer-tools/common-ports-reference)
- [Docker Run to Compose Converter](https://phishdestroy.io/developer-tools/docker-run-to-compose)
- [CIDR / Subnet Calculator](https://phishdestroy.io/developer-tools/cidr-subnet-calculator)

All tools: https://phishdestroy.io/developer-tools