Port Validator
Paste a port number to check whether it is valid — complete with the reason if it is invalid and a component breakdown if it is valid. Everything is processed on your device.
Everything runs in your browser. Your data is never sent to our servers.
Example
Example Input
8080
Example Output
✓ VALID — registered, HTTP-alt
How to Use
- 1Paste the a port number you want to check into the input box.
- 2If the tool offers extra options (e.g. dialect, flags, or variant), set them as needed.
- 3Click Validate (or press Ctrl+Enter).
- 4Read the result badge — VALID, INVALID, or VALID with a warning — along with the details and the list of issues, if any.
About Port Validator
Port Validator checks whether a number is a valid TCP/UDP port (0–65535) and shows its range: well-known (0–1023), registered (1024–49151), or dynamic/ephemeral (49152–65535). Common services (80, 443, 22, 3306, …) are also recognized.
Useful for validating server configuration, firewall rules, or environment variables before applying them.
FAQ
Is my data sent to a server?
No. All validation runs in your browser with JavaScript. Nothing is uploaded, logged, or stored on our servers — safe for sensitive data.
How is this validator different from a parser or formatter?
A validator answers one question: is this input correct/valid? It returns a valid/invalid badge with the reason. A parser breaks input into its components, and a formatter tidies its layout. Use a validator when you just need to confirm something is sound before using it.