Port Checker
Enter a host and port number to check whether that port is open and reachable.
How to Use Port Checker
- 1
Enter a host and port number, or pick a common port shortcut.
- 2
Click Check.
- 3
See whether the port is open, closed or timed out.
Port Checker Features
- Checks any TCP port from 1-65535 on a public host.
- Quick shortcuts for common ports (HTTP, HTTPS, SSH, FTP, MySQL).
- Shows connection time for open ports.
Why use Tool King?
Fast
No waiting rooms or sign-ups. Most files are ready in seconds.
Private
Files are processed in memory and discarded right after — never stored or shared.
Free
Every tool is free to use, with no hidden limits on the essentials.
Frequently Asked Questions
Related guides
What is DNS? A plain-English explanation
How your browser turns a domain name like example.com into the server it actually talks to — explained in plain English.
Read guideWhat is SSL? Understanding the padlock in your browser
Why that little padlock icon matters, and what it actually verifies — explained in plain English, with no security jargon required.
Read guideHow HTTPS actually works, step by step
The handshake that happens before a single byte of a webpage is loaded — explained step by step, in plain, jargon-free English.
Read guideRelated tools
Password Generator
Generate strong, random passwords.
UUID Generator
Generate random UUID v4 identifiers.
Hash Generator
Generate MD5, SHA-1, SHA-256, SHA-384 and SHA-512 hashes.
QR Code Generator
Turn any text, URL or contact info into a scannable QR code.
QR Code Scanner
Upload a QR code image and instantly decode its contents.
Barcode Generator
Generate CODE128, EAN-13 and other common barcode formats.