What Is an SFPACK File?

How to open, edit, and convert SFPACK files

A file with the SFPACK file extension is an SFPack Compressed SoundFont (.SF2) file. It's similar to other archive formats (like RAR, ZIP, and 7Z) but is used specifically for storing SF2 files.

The audio files in the SF2 format that are held in an SFPACK file are sample audio files that are often used in software applications and video games.


How to Open an SFPACK File

SFPACK files can be opened with Megota Software's portable program SFPack through the File > Add Files... menu. The program will unpack the SF2 audio files that are stored in the SFPACK file.

This program downloads in a ZIP archive with three other files. After you extract the files from the download, the SFPack program is the one called SFPACK.EXE.

The SFPack program should be all you need, but if it doesn't work, you might also be able to open the SFPACK file with a general file extractor tool like 7-Zip or PeaZip.

Once you've extracted the SF2 file from your SFPACK file, you can open it with SONAR from Cakewalk, Native Instruments' KONTAKT, MuseScore, and possibly Propellerhead's ReCycle. Since an SF2 file is based on the WAV format, it's possible that any program that opens WAV files may also be able to open SF2 files (but maybe only if you rename the file to .WAV).

It's possible that you might have an SFPACK file that's used for an entirely different purpose, completely unrelated to SoundFont files. One thing you can do is open it with a text editor to see if there's any sort of identifiable text that can help you learn what program was used to create that specific SFPACK file. If you can do that, you might be able to research a compatible viewer for the file.

If you find that an application on your PC does try to open the SFPACK file but it's the wrong application or if you would rather have another installed program open SFPACK files, change the default program to make that change in Windows.

How to Convert an SFPACK File

Since SFPACK files are really similar to other archive file types, it's highly unlikely that you can convert the file itself into another format. Plus, even if you could, it would only be able to convert to another archive format, which wouldn't really be of any use.

However, what you might be interested in is converting an SF2 file (which is stored within the SFPACK file) to another format. There are a few options here depending on how you want to proceed...

  • Xtrakk should be able to convert SF2 to WAV. A free audio converter can then convert that WAV file to a different audio format like MP3
  • Polyphone supports exporting SF2 to SF3 (which is like an SF2 file but uses the OGG audio format instead of WAV)
  • The sfZed tool can save an SF2 file to SFZ
  • Extreme Sample Converter is another program that might be able to convert an SF2 file