Fallout 3 BSA Decompressor

Thread
Fallout 3 BSA Decompressor
Updated
Feb 14, 2026
Published
Feb 1, 2026
Version
1.0
Unique DLs
0
Total DLs
0
Files
1

Fallout 3 BSA Decompressor

311 B

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A simple .bat script that decompresses the BSA and repacks them without compression.

The benefits are: Faster Performance.



Installation:

  1. Download BSARCH and place the executable in Fallout 3\Data
  2. Download FO3 BSA Decompressor and place the bat file in Fallout 3\Data
  3. Run Decompressor.bat and wait.....
  4. When done, you can delete: "Unpack" folder, BSARCH.exe and decompressor.bat



Before and after decompression:

Fallout - Meshes: 713mb to 1.66gb

Fallout - Textures: 1.04gb to 1.71gb


Every other BSA has no benefit of decompression, as they already are “decompressed”.


Uninstallation:


Verify your games files integrity

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