What is a GDG file?
A .GDG file is a GDevelop Project File originally created by Florian Rival. It serves as the main project file for games developed using the GDevelop game engine. These files store game logic, object properties, event sheets, and links to visual assets. Under the hood, .GDG files store this configuration data using standard XML structure. Occasionally, users might confuse these files with older configurations from other game engines like GameMaker Studio, but the .GDG format is specifically designed for the GDevelop ecosystem.
How to open GDG files?
viewer.online/gdg analyzes .GDG files to identify their exact format and creator software, shows which programs can open the file, and usually previews it. If you want to edit the file and continue building your game, you should open the file directly in the GDevelop desktop or web application. Because the file uses a standard text-based structure, you can also inspect its raw code using advanced text editors like Visual Studio Code or Notepad++.
Best practices and troubleshooting
Always back up your .GDG files before making manual changes. If your game project becomes corrupt and fails to load, you can often find the error by opening the file in a code editor and repairing broken XML tags. Since .GDG extensions might occasionally have multiple possible meanings across different software systems, we strongly recommend using viewer.online/gdg to identify the actual format of your specific file before editing it.
Software and tools
The primary software to manage this file format is GDevelop. To view the underlying data structure, command-line tools like cat on Linux or macOS, or code editors like Sublime Text, are highly effective.
Summary
Because .GDG files use the known XML format, viewer.online/gdg can safely open and display them online, eliminating compatibility problems.