Opening a XOM File

The XOM file type is primarily associated with Worms 4: Mayhem.

XOM	File extension: XOM
	File type:	game data file

What is a XOM file?

XOM files mostly belong to Worms 4: Mayhem. XOM files serve as containers for in-game data and save information. They are not generic documents but are used by specific games to store the state and progress of gameplay.

Worms 4: Mayhem: These files hold internal data such as levels and settings, and in some cases act as the Xbox game data file for Worms 3D. More info can be found at Team17.

Summertime Saga: Here, XOM files are used as game save files, often stored in JSON format. This makes the save data structured and sometimes viewable or editable with simple text tools. Some tools like the XOML Browser assist in viewing these files.

The Long Dark / Xenonauts: In these cases, XOM files record game progress and state, enabling the game to load a specific save. Visit The Long Dark for additional context.

FilExt.com tips: The file format may be either proprietary or readable as JSON. When in JSON, it often starts with a bracket and contains key-value pairs that represent game parameters. Use caution when editing these files directly, as incorrect changes can lead to data loss.

How do you open XOM files?

You need a suitable software like Worms 4: Mayhem to open a XOM file. Without proper software you will receive a Windows message "How do you want to open this file?" or "Windows cannot open this file" or a similar Mac/iPhone/Android alert. If you cannot open your XOM file correctly, try to right-click or long-press the file. Then click "Open with" and choose an application. You can also display a XOM file directly in the browser:. Just drag the file onto this browser window and drop it.

Online XOM Text Viewer

Choose your .xom file to analyze

or drag and drop it here

Online File Viewer

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XOM file format:

The file format determines how the data is stored in the file. The file format can be deduced from the file extension and the signature. If the file extension or signature does not match the file format, errors will occur when opening or editing the file. So you need a detailed analysis of a file to find out the format and the associated program. Below is our analysis of the XOM files:

XOM is not a commonly used file extension and includes different formats for different programs. But the following two file formats are common:

• 65% of all XOM files use the same file format, which can be identified by the letters "MOIK" at the beginning. The content consists of illegible binary data, which can only be read and interpreted by the associated programs. XOM files can be up to 24 MB in size, but are often around 8 KB - 390 KB. The file type was developed 10 years ago and is still in use today. The following keywords are characteristic: MOIK, TYPE and XContainer. A common filename is SaveGame.xom or WeapTwk.xom. Files like these have the following tags: save, game, brickie, glasses, bundle, mayhem and tweak.
• 20% of all XOM files internally utilize the JSON file format. JSON (JavaScript Object Notation) is a lightweight data−interchange format. It is easy for humans to read and write. It is easy for machines to parse and generate. They consist of unreadable binary data. XOM files can be up to 21 KB in size, but are often around 15 KB - 21 KB. The keywords "__type" : "System.Int32", "__type" : "System.String", "datetime" : {, "value" : 0, "quest_loisexam" : { and "quest_ravewalkietalkie" : { are typical for these files. The file name savegame0.xom or savegame1.xom is characteristic of these files.

All other XOM files (15%) have different formats, frequently e.g. shop. If you want to find out what your XOM file contains, drag and drop it onto this page.