FOS Converter

Extract text from Fallout save files (FOS)


Drop or upload your .FOS file
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How to extract text from your FOS file

  1. Click the "Select File" button above, and choose your FOS file.
  2. You’ll see a preview, if available.
  3. Click the "Convert file to..." button to extract text information.

Convert FOS to another file type

To convert FOS save files to another format, you need Fallout 4 or other Game software.

Convert a file to FOS

To convert other file formats to the "Saved Game File" file type, you need software like Fallout 4 or a similar tool.


About FOS files

The .FOS file extension is primarily known as a Fallout Game Save file used by Bethesda Game Studios. These files store player progress, character stats, inventory, and world states for games like Fallout 3, Fallout: New Vegas, and Fallout 4. Less commonly, a .FOS file functions as an HMI programming project file used by Fatek or Wecon HMI software, which is essentially a renamed ZIP archive, or a Faroudja Optimal Scaling video file based on the MP4 container. Users rarely need to convert a Fallout save file because it is tightly coupled to the game engine. The primary disadvantage of a .FOS game save is that it is a proprietary, binary format. It cannot be directly opened or edited with standard text editors without risking file corruption. If you want to modify your character's stats, you must use specialized community tools like a save editor. For the HMI project files, the disadvantage is that they require specific, niche industrial software to open natively. If you are dealing with an HMI project .FOS file, the best conversion targets are standard archive formats. HMI files can often be extracted or renamed to ZIP to access the underlying XML or graphic assets. Faroudja video files can usually be treated as MP4 files. Attempting to convert a Fallout save file to a text format like TXT or JSON requires dedicated parsing tools, and you will lose the ability to load the file back into the game if it is not repacked correctly. Because the .FOS game save is a closed, proprietary format, standard online converters fail to process it. Only the original game engine or specific community-built save editors can properly read or export the data. If our analysis detects a supported underlying or embedded format, like a standard ZIP archive or an MP4 video stream, viewing or extraction may still be possible.

Convert.Guru analyzes your FOS file, detects the exact format, and lets you read the text inside.

Users also converted XWM, SWW and D2S files.


FAQ

If you want to convert FOS file to EXE, ISO, BIN, CUE, PAK, WAD, PK3, PK4, BSP, MAP, SAV or DAT, you can use Fallout 4 or similar software from the "Game Save State Storage" category. In the File menu, look for Save As… or Export….

To convert MOD, BIN, CFG, SCX, DAT, MPQ, LOG, CUE, INI, EXE, SCM or ISO files to FOS, try Fallout 4 or another comparable tool in the "Game Save State Storage" category.



The FOS Converter Story

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 FOS converter.