Free online CAFF to MP3 converter

Source format overview

CAFF stands for Core Audio Format, an audio container developed by Apple. It is used mainly on macOS and related Apple software for storing uncompressed or compressed audio, metadata, and sometimes loop information. CAFF files are common in audio production, sound libraries, and application assets where high-quality audio preservation matters.

Target format overview

MP3 is one of the most widely supported audio formats in the world. It uses lossy compression to greatly reduce file size while keeping acceptable sound quality for music, speech, podcasts, and general playback. MP3 is ideal when you need broad compatibility with phones, car stereos, media players, web platforms, and older devices.

How to perform the conversion

The easiest way is to use the built-in converter on 101convert.com, where you can convert .caff to .mp3 for free without installing any software. Upload the CAFF file, choose MP3 as the output format, start the conversion, and then download the resulting file.

If you prefer desktop software, FFmpeg is the most reliable tool for this conversion. Install FFmpeg, then run a command such as ffmpeg -i input.caff output.mp3. This reads the CAFF audio and encodes it as MP3 using FFmpeg’s default MP3 settings.

In Audacity, you can also open the CAFF file if the format is supported by your build and installed libraries, then use File → Export → Export as MP3. If prompted, choose the MP3 encoder settings and save the file.

Quality and compatibility notes

Converting from CAFF to MP3 usually means moving from a higher-fidelity source to a lossy output. If the CAFF file contains uncompressed audio, the MP3 version will be smaller but will not preserve the original audio perfectly. For archiving or editing, keep the CAFF file; for sharing and playback, MP3 is usually the better choice.

Metadata support may change during conversion. Some tags, chapter markers, or loop data stored in CAFF may not transfer fully to MP3. Also, if the CAFF file contains multichannel audio, the MP3 output may be downmixed to stereo depending on the converter and settings. For best results, use a higher bitrate such as 192 kbps or 320 kbps when audio quality matters.