GRN Converter

Extract text from Granny 3D game assets (GRN)


Drop or upload your .GRN file
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How to extract text from your GRN file

  1. Click the "Select File" button above, and choose your GRN file.
  2. You’ll see a preview, if available.
  3. Click the "Convert file to..." button to extract text information.

Convert GRN to another file type

To convert GRN game assets to another format, you need Granny Viewer or other 3D software.

Convert a file to GRN

To convert other file formats to the "Compiled Game Model File" file type, you need software like Granny Viewer or a similar tool.


About GRN files

The .GRN file format primarily stores 3D models, skeletal rigs, and animations compiled using the Granny 3D toolkit by RAD Game Tools. It is also occasionally used as a data file for the Girin 2D graphics engine. These files are exclusively found within PC game installations. Modders and data miners often use specialized community tools like GRN Extractor, Noesis, or the official Granny Viewer to open them. The .GRN format is a highly proprietary, compiled game asset format. You cannot import it directly into standard 3D design software. It is essentially locked binary data optimized solely for rapid loading by a game engine, meaning it lacks the structural transparency of standard formats. Modders usually attempt to convert .GRN files to FBX, OBJ, or SMD to edit the 3D meshes and animations in Blender or Autodesk Maya. Be aware that rigging weights, bone hierarchies, and animation timing are frequently broken or lost during community-developed extraction processes. Because it is a compiled proprietary format, standard online converters fail completely to process it. Often, only the original game engine or specific reverse-engineering tools can properly read or export the data. However, you can use convert.guru. Just drag and drop your file to identify the format, view it, and convert it when possible. If our analysis detects a supported underlying or embedded format, viewing or conversion may still be possible.

Convert.Guru analyzes your GRN file, detects the exact format, and lets you read the text inside.

Users also converted GR2, BIK and ZRB files.


FAQ

If you want to convert GRN file to OBJ, FBX, DAE, 3DS, MAX, BLEND, MA, MB, C4D, STL, PLY or WRL, you can use Granny Viewer or similar software from the "3D Game Animation Asset" category. In the File menu, look for Save As… or Export….

To convert DWG, DAE, X3D, IGES, WRL, JT, SKP, 3DS, 3DM, OBJ, STEP or FBX files to GRN, try Granny Viewer or another comparable tool in the "3D Game Animation Asset" category.



The GRN Converter Story

The history of Convert.Guru began over 25 years ago in California with Tom Simondi’s file-format database. A former contributor to Space Shuttle development and a software pioneer of the 1980s, Simondi established a trusted resource for file type analysis that was even referenced by Microsoft Windows XP. Today, we use modern technology to process and convert thousands of file formats while continually improving our GRN converter.