>> JEM file

JEM file format description

Many people share .jem files without attaching instructions on how to use it. Yet it isn’t evident for everyone which program a .jem file can be edited, converted or printed with. On this page, we try to provide assistance for handling .jem files.

1 filename extension(s) found in our database.

.jem - Optifine JSON Entity Model

The JEM data files are related to Optifine. The JEM file is an Optifine JSON Entity Model. OptiFine is a Minecraft optimization mod. It allows Minecraft to run faster and look better with full support for HD textures and many configuration options.

Data files
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Optifine JSON Entity Model related extensions:
Optifine JSON Part Model

Naturally, other applications may also use the .jem file extension. Even harmful programs can create .jem files. Be especially cautious with .jem files coming from an unknown source!

Can't open a .jem file?

When you double-click a file to open it, Windows examines the filename extension. If Windows recognizes the filename extension, it opens the file in the program that is associated with that filename extension. When Windows does not recognize a filename extension, you receive the following message:

Windows can't open this file:


To open this file, Windows needs to know what program you want to use to open it. Windows can go online to look it up automatically, or you can manually select one from a list of programs that are installed on your computer.

To avoid this error, you need to set the file association correctly.

The .jem file extension is often given incorrectly!

According to the searches on our site, these misspellings were the most common in the past year:

em, iem, jdm, je, jfm, jm, jrm, jsm, mem, uem

Is it possible that the filename extension is misspelled?

Similar file extensions in our database:

Parallels Desktop Memory Dump
PCEM Electromask Data
Adobe Encore Menu Template
Medical Expense Manager Data
jMusic Music Score
Corel WordPerfect Macro Editor Macro

Operating systems currently supports the following operating systems:

Windows XP/Vista, Windows 7/8, Windows 10, CentOS, Debian GNU/Linux, Ubuntu Linux, FreeBSD, Mac OS X, iOS, Android

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If you have useful information about the .jem file format, then write to us!