Development
Random Port Generator
Choose distinct random integers in a port range for test configuration without scanning the device or reserving sockets.
About this tool
When to use it
Choose distinct random integers in a port range for test configuration without scanning the device or reserving sockets.
How to use it
Set the count and inclusive minimum/maximum, then select Generate ports. Try the candidate in your application and handle bind errors there. Record the chosen value in your configuration once it is actually assigned.
Guide updated . Examples checked against this implementation.
Worked examples
A single possible candidate
Input
How many: 1; Minimum: 3010; Maximum: 3010Expected output
3010A range with one value can only produce that value. Wider ranges produce random distinct candidates, not confirmed available ports.
Errors and unsupported input
Requesting 5 ports from 3010–3012Widen the range or request at most 3. Unique generation needs at least as many candidates as the requested count.
Continue this workflow
- Docker Run to Compose Converter: Review how host and container ports map in a Compose draft.
Questions
Frequently asked questions
Does a generated port remain reserved for me?
No. A port becomes assigned when an application successfully binds it. Another process may already be using the candidate.