Extract text from Minecraft entity models (JEM)
To convert JEM entity models to another format, you need Blockbench or other 3D software.
To convert other file formats to the "JSON Entity Model" file type, you need software like Blockbench or a similar tool.
A .jem file is a JSON Entity Model primarily used by the OptiFine mod for Minecraft to replace or modify the 3D models of in-game entities like zombies, creepers, or items. It stores structural data, including bones, hitboxes, and UV mapping rotations, entirely in standard JSON format.
While the underlying text structure is standard JSON, the schema is entirely proprietary to the OptiFine modding ecosystem. This means .jem files are completely useless in standard 3D modeling software without dedicated plugins. A single missing bracket or comma will cause the game engine to reject the model silently. Additionally, models designed for specific game versions often break in newer updates due to hardcoded animation changes.
To use these models outside of Minecraft or to edit them effectively, conversion is required. Convert .JEM to JSON to fix raw syntax errors in a code editor. For 3D manipulation, convert to standard formats like OBJ or GLTF (often via Blockbench). This allows you to import the model into standard 3D suites like Blender or game engines like Unity. Drag and drop your file here to analyze and convert it - free, online, and without installing software.
Convert.Guru analyzes your JEM file, detects the exact format, and lets you read the text inside.
Users also converted JSON, ZIP, JPG, BBMODEL, JAVA, OBJ, ZST, CDW, LDR and X_B files.
If you want to convert JEM file to CSV, JSON, XML, YAML, YML, TOML, INI, CFG, CONF, DAT, DB or SQL, you can use Blockbench or similar software from the "Minecraft Custom Entity Model" category. In the File menu, look for Save As… or Export….
To convert DBF, XML, SQLITE, XLSX, SQL, TSV, ACCDB, YAML, MDB, CSV, ODS or JSON files to JEM, try Blockbench or another comparable tool in the "Minecraft Custom Entity Model" 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 JEM converter.