.JEM File Extension

A JEM file contains entity model information used to alter models in Minecraft with the OptiFine mod tool installed. It stores information about the model in JSON format, which may include the path to a .PNG image that textures the model and information about various parts of the model.

You can open and edit JEM files with various model editors, such as Blockbench and Cubik Studio. These tools allow you to visualize the model while you edit JEM files.

Since JEM files are saved in plain text in JSON format, you can also open and edit the files with text editors. Keep in mind that you will not be able to view the models when editing them.

A JEM file is a texture used in a Gogii Games video game, such as Princess Isabella 2 or Whispered Legends: Tales of Middleport. It is applied to a 3D model to give the appearance of skin, clothing, etc. JEM files are not intended to be opened by players.

Gogii Games is a Canadian video game developer known primarily for publishing hidden object and adventure games. The company uses the Kanji Game Engine to develop many of its games. Games developed using the Kanji Game Engine often store textures as JEM files.

JEM files cannot be opened outside the games they are included in. However, you can use QuickBMS and an associated .BMS script (linked below) to convert JEM files to .DDS files. Then, you can open the DDS files in IrfanView, GIMP, or another program that supports DDS files.