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.

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

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

Scan ports online for free. Find open ports on servers. Network security scanner.

Scan TCP ports on any host to find open services

Target Host

Start Port

End Port

How Port Scanning Works:

1

Define start and end port numbers

2

See common ports in that range

3

Understand associated services

4

Use for development and learning

No, this is a reference tool that shows common port information. It does not perform actual network scanning.

Ports are divided into: Well-known (0-1023), Registered (1024-49151), and Dynamic/Private (49152-65535).

Scanning your own systems is legal. Scanning others without permission is illegal in many jurisdictions. This tool is for education only.

Ports allow multiple services to run on one IP address by distinguishing between different network connections and applications.