Opening a KFS File

The KFS file type is primarily associated with 7-Zip.

KFS	File extension: KFS
	File type:	Game archive file

What is a KFS file?

KFS files mostly belong to 7-Zip. Main usage: KFS files serve as game asset containers, primarily for King's Bounty: The Legend. They use a ZIP-based compression to pack game data such as textures, models, and levels.

ZIP compression is used internally, so the data is archived in a standard way.

The game engine reads these files directly to load assets during gameplay.

Other usage: A small number of KFS files are used in other games. For example, some contain face textures in Max Payne and face model data in Killzone 2.

Details on this alternate usage can be found on the related page.

FilExt.com tip: If you need to inspect or extract the contents, you may rename the file to .zip and open it with a common archive tool.

How to open a KFS file

You need a suitable software like 7-Zip to open a KFS 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 KFS file correctly, try to right-click or long-press the file. Then click "Open with" and choose an application. You can also display a KFS file directly in the browser:. Just drag the file onto this browser window and drop it.

Online KFS Text Viewer

Choose your .kfs file to analyze

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Online File Viewer

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Programs that open and convert KFS files:

7-Zip
See the previous paragraphs to learn more about the main application. KFS files are often referred to as 7-Zip games because this type of file is primarily created or used by this software.
Max Payne (Model File) by Rockstar Games
Pegasus Mail (Static Kill File) by David Harris
You can specify a static kill file for autoreplies on a user by user basis. When generating an autoreply, Mercury checks to see if this file is in the user's mail directory. If it's there, it is checked for the address before the autoreply is transmitted.

KFS file format details:

Why is it important to know the file format? This is the only way to find out which program to use to open the file. The first characters in a file identify the file format, for example, HTML files start with the bytes <html>. Frequently, however, one file extension is used by different programs for different file formats, and one file format for different file extensions. So a detailed analysis of a file is vital in order to determine the format and the associated program. Our examination of the KFS files comes to the following conclusion:

An KFS file is mainly used by one program with a specific format. The two most common formats are as follows:

90% of all KFS files are based on the zip format, that is, a KFS file includes multiple compressed files. Primarily 19 to 290 files are included. You can see the included files and images by renaming the file extension to .zip and then double-clicking it. The files are 520 KB to 70 MB in size, with a median of 5 MB. A usual file name is ses.kfs or loc_ses.kfs. Such files are related to data, textures, interface, models, orcs, animation, sands, sounds and hirao.
2% of all KFS files have the same signature 0C 0F 00 01 00 00 00 00. If you open these files in a text editor, you will see only illegible characters. KFS files can be up to 120 KB in size, but are often around 650 bytes - 120 KB. The following keywords are characteristic: sharedtextures, textures;..\, Face and FaceTexture. Examples of file names are Payne_Max_L0.kfs. These files are often associated with person-related data.

All other KFS files (8%) have no consistent format. These files sometimes refer to familiar, declarations, enhance, master, fonts, game, info, maps or rage. If you want to find out what your KFS file contains, drag and drop it onto this page.

Technical Data for KFS File Extension

File classification:

Game

Related files:

pk3, vpk, kfc_data, kf2, bma, kfx, ksf, info, data, exe, skd, mp2m, zip, pak, dat

a kfs Game archive file is a special file format and should only be edited and saved with the appropriate software.

How to solve problems with KFS files

Associate the KFS file extension with the correct application.
Update your software that should actually open game archive files. Because only the current version supports the latest KFS file format. Search, therefore, e.g. on the manufacturer website after an available 7-Zip update.
To make sure that your KFS file is not corrupted or virus-infected, get the file again and scan it with Google's virustotal.com.
Click here to open your .KFS file online - secure, fast, and no downloads needed.