What is a CONFIG file?
A .CONFIG file is an application settings file. It stores data that tells a software program how to run. The most common use is for the Microsoft .NET Framework. In this system, .CONFIG files hold application settings in an XML format.
However, .CONFIG is a generic extension. Many other systems use it. The Unity game engine uses .CONFIG files for player startup configurations, often using a JSON format. Git uses them to store repository settings. Hardware systems, such as the F5 BIG-IP load balancers, use the extension for compressed configuration archives using GZIP. It is also sometimes used as a database file format.
How to open CONFIG files?
Because most .CONFIG files are standard text files, you can open them with basic text editors. You can use Notepad on Windows, Apple TextEdit on macOS, or code editors like Visual Studio Code or Notepad++.
However, if the .CONFIG file is a binary file, an encrypted database, or a compressed archive, a normal text editor will show scrambled, unreadable characters.
Inspecting CONFIG files online
Because a .CONFIG file can belong to many different programs, you might not know what software created it. You can use viewer.online/config to analyze .CONFIG files. The tool identifies the exact format and creator software. It allows you to inspect the file structure, extract readable text, and check whether an online preview is available.
File Conversion
Sometimes you need to change a .CONFIG file into a different format to share it or document it. We recommend using convert.guru to handle file conversions. For example, you can safely convert text-based .CONFIG files into .TXT, .XML, or .JSON formats for easier sharing.
Summary
viewer.online/config is highly useful for identifying, inspecting, and understanding .CONFIG files without installing software or dealing with compatibility problems. It takes the guesswork out of unknown configuration files and lets you safely read their contents.