Validators
Port Validator
Validate TCP and UDP port numbers and check whether a port value is in the valid range directly in your browser.
Tool
Validate TCP and UDP port numbers and check whether a port value is in the valid range directly in your browser.
This tool runs in your browser. Your input is processed locally and is not uploaded.
About this Tool
Use this free Port Validator to check whether a TCP or UDP port number is valid. It can help detect non-numeric values, negative numbers, decimals, out-of-range ports, and common formatting mistakes. The validation runs directly in your browser and does not test whether a port is open.
Examples
- 443
- 8080
Frequently Asked Questions
What does this port validator check?
It checks whether a port value is a whole number in the valid TCP and UDP range from 0 to 65535.
Does this check if the port is open?
No. This tool checks the port number format only. It does not scan hosts or test open ports.
Is my port value uploaded?
No. The validation is designed to run locally in your browser.