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Need for Speed High Stakes Downloads

unvivtool 1.18

unvivtool 1.18
Added On February 25, 2023
Views 1,667
Downloads 57
Version High Stakes
File Size 57.09 KB
Favorited 0 times
Average Rating
10/10 - 3 votes
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File updated on: April 7, 2024


unvivtool is a modern VIV decoder/encoder

Purported VIV/BIG archives sometimes contain faulty or manipulated header information. unvivtool is designed to validate and recover data as much as possible.

Compatibility: many Electronic Arts games, including most Need For Speed versions

Formats: The formats are called BIGF, BIGH, and BIG4 (equals first 4 bytes). Typical file extensions are .VIV and .BIG.

Runs on Windows 98 and later versions.


  • decode and encode archive
  • validate archive
  • decode entire archive at once
  • retrieve a single file from archive (by index or filename)
  • list archive contents without writing to disk (dry run)
  • encode files in set order
  • fully support UTF8-filenames in archive
  • fully support non-printable filenames in archive (represent as Base16)
  • decode/encode with set fixed directory entry length

Also available as Python extension module from


  • Version 1.2 uploaded April 7, 2024

    bfut uploaded a new version. The new file is 57.09 KB.

    + CLI: drag-and-drop multiple files onto the executable to encode them into a VIV archive
    + CLI: drag-and-drop a VIV/BIG archive onto the executable to decode it
    + Decoder: skips invalid files instead of erroring out
  • Version 1.1 uploaded March 31, 2024

    bfut uploaded a new version. The new file is 50.87 KB.

    + Windows 98 compatibility
  • Initial version uploaded February 25, 2023

    bfut uploaded initial version. The original file is 50.87 KB.

Visitor Comments

  • bug110 - 1 year ago
    User Date
    bfut1 year ago
    pete951611 days ago
    awesome! thank you for uploading this to nfsaddons, it will be easier to find than github :)

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