Does this check if the port is open?

No. This only validates the numeric range.

Can I validate ranges?

This tool validates single ports; use a range-specific tool for spans.

developer validator

Port Validator

Check port numbers for valid ranges before using them in configs.

Results

Paste input and validate locally.

Status: Ready when you validate.
Details: Ready when you validate.

Rules & checks

Accepts integer ports from 1 to 65535.

Rejects non-numeric and out-of-range values.

When to use it

Validate port inputs in config forms or CLI arguments
Check service definitions before deploying
Quick sanity check for firewall or proxy configs

Tips

Reserve low ports for system services
Document whether your service expects TLS on the chosen port

Examples

Valid port

8080 -> valid

Invalid port

70000 -> invalid (out of range)

FAQs

Does this check if the port is open?: No. This only validates the numeric range.
Can I validate ranges?: This tool validates single ports; use a range-specific tool for spans.

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