Extract text from Custom structure files (BO4)
To convert BO4 Structures to another format, you need Open Terrain Generator or other Game software.
To convert other file formats to the "Game Mod Object File" file type, you need software like Open Terrain Generator or a similar tool.
The .bo4 file extension is a Custom Structure file utilized by the Open Terrain Generator (OTG) mod for Minecraft. Developed by PG85, it contains explicit block placement data, entity locations, spawn weight rules, and biome constraints. Modders use these files to inject custom trees, dungeons, floating islands, and buildings into procedurally generated game worlds.
Working with .bo4 files outside the game is notoriously difficult. Because it is a proprietary, hyper-niche format tied to a specific Java environment, generic 3D modeling programs like Blender or standard CAD software cannot read the proprietary Minecraft block coordinates. You cannot simply double-click the file to view the 3D model. Users often need to convert these structures into more universal Minecraft formats like schematic, litematic, or nbt to share them across different servers or edit them in external tools.
Standard online converters fail to process this format because they lack the specific game block dictionaries required to render the data. Since .bo4 files contain a mix of binary data and human-readable configuration parameters, our analysis can extract the text-based rules, allowing you to inspect or salvage the structural logic even without the game installed.
Convert.Guru analyzes your BO4 file, detects the exact format, and lets you read the text inside.
If you want to convert BO4 file to EXE, ISO, BIN, CUE, PAK, WAD, PK3, PK4, BSP, MAP, SAV or DAT, you can use Open Terrain Generator or similar software from the "Minecraft Mod Structure Data" category. In the File menu, look for Save As… or Export….
To convert MOD, BIN, CFG, SCX, DAT, MPQ, LOG, CUE, INI, EXE, SCM or ISO files to BO4, try Open Terrain Generator or another comparable tool in the "Minecraft Mod Structure Data" category.
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 BO4 converter.