Gaijin.at - Freeware and Online Tools

Useful Applications, Online Tools and Information about
Internet and Data Security.

Port Numbers

A list of port numbers, their name, description, and additional information.

IP Calculator displays information about an IP address or an IP address range, like subnet-mask, CIDR notation and different notations of the address and the address range.

Start Now

CyberChef

A brief overview of CyberChef and a description of its main features.

Windows Version Numbers

A list with version and build numbers of Microsoft Windows.
New version added

Local Browser Start Pages

Local start pages for web browsers with search fields for several search engines and online services.
Updated

CyberChef Recipes

Recipes for CyberChef, a web application for analyzing and decoding data.
1 new recipe added

Regular Expressions

A collection of useful regular expressions, among others for URLs, phone numbers, e-mail addresses, IP addresses and wallet addresses.
New

CyberChef

A brief overview of CyberChef and a description of its main features.
A case study has been added.
The examples can be tried out directly in CyberChef with a link.

CyberChef Gaijin.at Version

CyberChef is a web application for analyzing and decoding data.
The Gaijin.at version contains operations not contained in the original version.
New

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Port Numbers

IP Calculator

CyberChef

News and Updates

Windows Version Numbers

Local Browser Start Pages

CyberChef Recipes

Regular Expressions

CyberChef

CyberChef Gaijin.at Version