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About this mod

Updated BSA Browser from Fallout Mod Manager with support for BA2 archives.

Permissions and credits


BSA Browser is an application to open and extract files from .BSA and .BA2 archives.

This was forked from Fallout Mod Manager's built-in BSA Browser. It was originally only for .BSA files hence the name BSA Browser. However it's been updated it to support .BA2 files as well.

BSA Browser is open source and available from GitHub: BSA_Browser


  • Browse and extract file(s) from BSA and BA2 files
  • Sort by folder, file name, file size, or extension. Ascending or descending
  • Search for files, with optional Regex support
  • Drag & drop file extraction
  • Browse multiple archives simultaneously
  • Recent files list
  • Quick export (See Tools -> Options menu)

Credits on GitHub

Install & Uninstall

Use the provided installer or portable version, which you just extract & run.

Version History


  • More detailed report when files fail to extract
  • Fixed opening archives containing special characters in file names


  • Fixed broken extraction for many BSA archives
  • Added links to Fallout 4 and Skyrim Nexus Pages and to GitHub in Help menu
  • All unhandled exceptions are now saved to 'stack traces' folder. Useful when reporting bugs
  • CLI: Defaults to list (/l) option


  • Added option to set max recent files
  • Changed file list font to Segoe UI
  • Updated the progress dialog appearance. The ETA isn't super accurate, but best I can do atm. It's going to be improved
  • Increased Morrowind archive reading speed by up to 387.587% (7s average -> 1.5s average reading the Morrowind.bsa 100 times)
  • Fixed error opening some archives caused by always using system default encoding. This caused errors on some systems, for example systems set to Japanese locale


Note: Previews are getting outdated, many Fallout 76 textures show incorrectly or don't work at all. Gonna look into updating, but it's not my code so not familiar with it yet

  • Implemented DX10 headers for Fallout 76. GIMP DDS support isn't great for Fallout 76, so you might wanna look into Photoshop or other tools
  • Changed how errors are handled during extraction. Extraction continues and a report is written in the destination
  • Updated Progress window
  • Fixed BA2 textures being extracted with null bytes at the end
  • Fixed being able to click extract while one is already active by blocking main window during


  • Fixed some textures causing invalid DDS header error


  • Very early Fallout 76 support
  • Added tool to compare archives. See what has been added, removed or changed
  • Removed "This archive is already opened" message. Bring window to front instead
  • Fixed rare decompress error with certain files (e.g. True Storms, Skyland)