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SoXFLAC
Free

Free and open source under GPL-2.0 and LGPL licences.

 Free

Free and open source; libraries under BSD-3-Clause and tools under the GPL.

Windows, macOS, Linux, Command line Windows, Command line
  • Converts between many audio file formats
  • Applies effects and filters during conversion
  • Reference implementation of an open, patent-free format
  • Lossless compression with bit-exact decoding
  • Command line only, with no graphical interface
  • Infrequent releases
  • Command-line only; needs a separate front end for a GUI
  • Lossless files remain larger than MP3 or AAC
Downloadable app Downloadable app
Open source Open source
License: GPL-2.0-or-later AND LGPL-2.1-or-later License: BSD-3-Clause, GPL-3.0-or-later
No account needed No account needed
Works offline Works offline

Checked October 1, 2026

Checked October 2, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.