Open Port Checker & Service Scanner
Test whether a port is open on a server
Only the listed standard ports can be tested, private addresses are refused, and checks are limited to 5 per minute. An open port is not proof the service behind it is healthy.
How to Use Open Port Checker & Service Scanner
Select or Upload
Choose your file or paste your input into the workspace above. Drag and drop is supported.
Configure & Process
Adjust options to fit your task. Processing runs immediately with no waiting queue.
Download Result
Preview and save your output in one click with no watermarks or sign-up prompts.
Private & Confidential
Browser tools process files locally on your device, and server temporary files are deleted automatically within 15 minutes.
Free & No Registration
Full access to every utility without creating an account, signing in, or hitting paywalls.
Works on Any Device
Responsive layout that runs smoothly on desktop, tablet, and mobile browsers across all operating systems.
Frequently Asked Questions
Is Open Port Checker & Service Scanner completely free to use?
Yes, Open Port Checker & Service Scanner on KiloToolbox is 100% free with no limits, hidden fees, or account sign-up required.
Are my files safe and private?
Yes. Files are transmitted over an encrypted HTTPS connection to our processing server. Temporary files are deleted automatically within 15 minutes of job completion, and your data is never retained, analyzed, or shared.
Can I use Open Port Checker & Service Scanner on mobile phones and tablets?
Yes, KiloToolbox is fully responsive and runs smoothly on iPhone, Android, iPad, Mac, Windows, and Linux.