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Welcome to the fre:ac project
Sunday, 11 July 2010 14:00

fre:ac is a free audio converter and CD ripper with support for various popular formats and encoders. It currently converts between MP3, MP4/M4A, WMA, Ogg Vorbis, FLAC, AAC, WAV and Bonk formats.

With fre:ac you easily rip your audio CDs to MP3 or WMA files for use with your hardware player or convert files that do not play with other audio software. You can even convert whole music libraries retaining the folder and filename structure.

The integrated CD ripper supports the CDDB/freedb online CD database. It will automatically query song information and write it to ID3v2 or other title information tags.

Features (click an entry to see details)

  • Converter for MP3, MP4/M4A, WMA, Ogg Vorbis, FLAC, AAC, WAV and Bonk formats

    fre:ac converts freely between all supported formats. No matter if you need WMA to MP3, MP3 to WAV, M4A to MP3, WAV to MP3 or any other conversion, fre:ac supports any combination of formats.

  • Integrated CD ripper with CDDB/freedb title database support

    The integrated CD ripper will convert your audio CDs to files on your hard disk. It supports all of the formats available for regular audio file conversion. fre:ac can query the CDDB/freedb online CD database to find artist and title information prior to ripping. No need to enter track names manually.

  • Portable application, install on a USB stick and take it with you

    fre:ac can be installed on a USB stick or external drive so you can take it with you and use it on any computer. It will also store its configuration files on the portable drive. That way it will always start up with your custom settings.

  • Multi-core optimized encoders to speed up conversions on modern PCs

    The MP3, MP4/M4A, Ogg Vorbis, FLAC, AAC and Bonk encoders integrated with fre:ac make use of modern multi-core CPUs, so ripping and converting speeds get a real boost. You will save time and get the job done quickly.

  • Full Unicode support for tags and file names

    fre:ac provides full support for the Unicode character set. That way it can handle not only Latin scripts, but also Japanese, Cyrillic, Arabic or Indian. If you like music from all over the world, you can tag your files correctly.

  • Easy to learn and use, still offers expert options when you need them

    fre:ac's user interface is designed to be intuitive so you will be able to use the basic features without any trouble. It still offers advanced options when you need them so you will be able to go beyond simple ripping and format conversion using fre:ac.

  • Multilingual user interface available in 40 languages

    fre:ac comes with a multilingual user interface and is currently available in 40 languages (English, German, French, Spanish, Spanish (Latin American), Italian, Japanese, Korean, Chinese (simplified), Chinese (traditional), Vietnamese, Russian, Ukrainian, Bulgarian, Polish, Serbian, Croatian, Czech, Slovak, Dutch, Danish, Swedish, Norwegian, Finnish, Estonian, Lithuanian, Greek, Turkish, Hungarian, Romanian, Portuguese, Portuguese (Brazilian), Hebrew, Arabic, Afrikaans, Basque, Esperanto, Galician, Catalan and Valencian). It can be translated to other languages easily using the 'smooth Translator' utility that is included in the distribution.

  • Completely free and open source without a catch

    fre:ac is available for free without any adware or other foul things. However, the project relies on your support to be able to push the development further. If you like this software, please consider making a donation. Click on one of the icons in the donation section to the right to support the fre:ac project with a donation.

Please help fre:ac become Project of the Month
Monday, 17 August 2015 09:12

fre:ac has been selected to participate in the Community Choice Project of the Month Vote on SourceForge. Winning the vote would make it the October 2015 Project of the Month.

Please help the fre:ac project win by leaving a comment at the October 2015 Community Choice Project of the Month Vote page. The first line of your comment should contain the vote (note that the technical SourceForge project name for the fre:ac project is still bonkenc, the original name of this project):

VOTE: bonkenc

Additional lines may contain an optional comment. It would be great if you would take the time to mention what you like about fre:ac.

Thank you for your help!

fre:ac v1.0.24
Saturday, 01 August 2015 13:45

fre:ac version 1.0.24 has been released on 1st August 2015. This release updates codecs fixes several minor issues found in earlier versions.

The new release updates the Ogg Vorbis codec to version 1.3.5 with added aoTuV 6.03 patches and introduces a flat titlebar style for Windows 8.x and 10. In addition, fre:ac 1.0.24 now retains the disc number metadata field when converting, fixes CDs being ejected automatically even if a conversion was cancelled and adds mouse jitter tolerance to tooltips to make them display more reliably.

Upgrading to fre:ac v1.0.24 is recommended to all users of earlier versions. You can download it at the downloads section of this site.

fre:ac snapshot 20150725
Saturday, 25 July 2015 19:23

fre:ac snapshot 20150725 has been released and is now available for download!

This release adds support for verification of FLAC, TAK and WavPack input files and improves support for multi-channel audio. The latter includes support for decoding AC-3, DTS and MLP files as well as support for multi-channel WAV, FLAC, Ogg Vorbis and WMA. Besides that, the configuration management code has been rewritten to allow changing the configuration while a conversion job is in progress.

The new release also fixes an issue with the Ogg Vorbis encoder producing garbled output on non-Windows x64 platforms.

Please be aware that this is a preview release which is not meant for daily work. Please report issues on the SourceForge bug tracker or by email to

The new snapshot is available in the downloads section.

fre:ac snapshot 20150705
Sunday, 05 July 2015 15:34

fre:ac snapshot 20150705 has been released and is now available for download!

This release enables the parallel conversion mode introduced in 20140921 by default. The parallel mode runs multiple file conversions at the same time on multi-core processors, thus speeding up conversion times. It will make use of all physical CPU cores by default and can be configured to also use virtual/HT cores.

fre:ac 20150705 also introduces support for verifying lossless output files such as FLAC or ALAC. This can be enabled in the configuration dialog and will add a verification step for each conversion to a lossless format where the output file is decoded again and compared to the original input.

The new release also fixes some issues, especially with the OS X version:

  • Crashes when trying to add audio CD contents on OS X
  • Distorted audio playback on OS X
  • Ejecting CDs did not work on OS X and Linux

Several minor issues are fixed in addition to this and codecs are updated to their latest versions.

Please be aware that this is a preview release which is not meant for daily work and might contain bugs. Especially with the conversion engine being almost completely rewritten in this release, new issues may have been introduced. Please report issues on the SourceForge bug tracker or by email to

The new snapshot is available in the downloads section.


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fre:ac 1.0.24, Windows


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