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xACT stands for X Audio Compression Toolkit, an application that encodes and decodes FLAC, SHN, Monkey's Audio, TTA, Wavpack, and Apple Lossless files. It also can encode these formats to MP3, AAC, or Opus, and do various other utility functions, in addition to a full set of shntool functions. Under the hood, xACT is a GUI based front end for the unix applications Shorten (3.6.1), shntool (3.0.10), Monkey's Audio Compressor (3.99), flac (1.3.1), wavpack (4.70.0), TTA (3.4.1), Opus 0.1.6, and cdda2wav 3.0 (with paranoia support). It also uses SoX ( more...

What's New

Version 2.36:
  • Bug fix for tagging files - added check to see if file is read-only
  • xACT will now convert WAV > AIFF and AIFF > WAV using the "Decode" tab
  • recompiled wavpack 4.70.0 from source to make compatible with Max OS X 10.7
  • Upgraded SoX to 14.4.2


  • OS X 10.6 or later

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Current Version (2.x)


Downloads 754,207
Version Downloads 6,976
License Free
Date 09 Jun 2015
Platform Intel 64 / OS X
Price Free
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