Are NanoTools completely free to use?

Yes, all basic tools on NanoTools are completely free to use with no registration required. We offer premium features for power users.

Is my data secure when using NanoTools?

Your files are processed securely and are automatically deleted after processing. We do not store your files or data on our servers.

Do I need to install any software to use NanoTools?

No installation required. All tools work directly in your browser on any device - computer, tablet, or smartphone.

What file formats are supported?

We support a wide range of formats including PDF, JPG, PNG, WebP, GIF, JSON, XML, CSV, and many more depending on the tool.

NanoTools

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Port Checker Online - Check Open Ports

Check port status online for free. See if TCP/UDP ports are open. Network diagnostics tool.

Port Information Lookup

Look up port numbers and their associated services

Enter Port Number

Common Ports Reference

80 - HTTP (Web)

443 - HTTPS (Secure Web)

22 - SSH (Secure Shell)

3306 - MySQL Database

5432 - PostgreSQL Database

27017 - MongoDB Database

6379 - Redis Cache

8080 - HTTP Alternate

Note: This is a port information reference tool.

Browser security prevents checking if ports are actually open. To scan for open ports on your system, use command-line tools like:

• netstat -an - View active connections
• lsof -i :PORT - Check specific port (macOS/Linux)
• nmap https://nanotools.app - Scan ports with nmap

What This Tool Does

Display port information and details
Show common services for ports
Identify well-known port numbers
Provide protocol information
Educational port reference

How to Use

1
Enter port
Type a port number (1-65535)
2
View info
See common service and protocol
3
Learn
Understand port usage and security
4
Reference
Use as a quick lookup tool

How it works

Enter port

Type a port number (1-65535)

View info

See common service and protocol

Learn

Understand port usage and security

Reference

Use as a quick lookup tool

Use Cases

Network troubleshooting
Security auditing
Service identification
Learning networking concepts
Firewall configuration

Frequently Asked Questions

What are well-known ports?

Ports 0-1023 are well-known ports assigned by IANA for standard services like HTTP (80), HTTPS (443), SSH (22), and FTP (21).

Can this scan my network?

No, this is an educational reference tool that provides information about ports. It does not perform network scanning.

What is a port number?

A port number is a 16-bit identifier (0-65535) used to distinguish different services or applications on a network host.

How do I know if a port is open?

This tool provides reference information only. To check if ports are actually open, use network scanning tools or system commands.