All The Validators logoAll The Validators

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.

Related validators

developer

IPv4 Validator

Confirm IPv4 addresses are well-formed before using them in configs or requests.

web

URL Validator & HTTP Link Parser

Validate HTTP and HTTPS URLs locally, parse host/path, and catch malformed links before publishing, importing, or sending them to APIs.

Format-only; does not test connectivity.