Free online MP2 to CAFF converter

Source format: MP2

MP2 (MPEG-1 Audio Layer II) is a compressed audio format that was widely used in broadcasting, digital radio, and older multimedia systems. It is an older but still recognizable lossy format, valued for its simplicity and compatibility with legacy hardware and software. MP2 files are typically used for archival broadcast audio, some DVD-related workflows, and situations where a modest compression ratio is acceptable.

Target format: CAF

CAF (Core Audio Format) is an Apple-designed audio container that supports very large files, high sample rates, multiple channels, and a wide range of audio encodings. It is commonly used in macOS and iOS audio workflows, especially in professional audio editing, sound design, and application development. A key advantage of CAF is that it can store long recordings without the size limitations of older container formats.

How to perform the conversion

The most reliable way to convert MP2 to CAF is with a desktop audio tool that can decode MP2 and export to CAF, such as FFmpeg or Audacity. If you want a quick browser-based option, you can convert the file on 101convert.com for free without installing any software.

Using FFmpeg

1. Install FFmpeg on your computer.
2. Open a terminal or command prompt in the folder containing the MP2 file.
3. Run a command such as ffmpeg -i input.mp2 output.caf.
4. If you want to preserve the audio as uncompressed PCM inside CAF, FFmpeg will usually choose a compatible encoding automatically; if needed, you can explicitly set the codec, for example ffmpeg -i input.mp2 -c:a pcm_s16le output.caf.

Using Audacity

1. Open the MP2 file in Audacity.
2. Check that the audio plays correctly and that the sample rate is appropriate.
3. Choose File → Export → Export Audio.
4. Select CAF as the output format if available in your build, then save the file.

Using Apple tools

On macOS, some professional audio applications and Apple-compatible workflows can export CAF directly. Import the MP2 file, then use the export or bounce function to save as CAF. The exact menu path depends on the app, but it is usually found under File → Export or File → Bounce.

Quality, compatibility, and limitations

MP2 is already lossy, so converting it to CAF does not restore lost audio quality. If the CAF file is exported as uncompressed PCM, the result will usually be much larger than the original MP2. If the CAF file uses a compressed codec, compatibility may depend on the software that opens it.

CAF is best supported on Apple platforms and in professional audio software. Some players and editors on Windows or Linux may not open CAF files reliably, especially if they expect a specific codec inside the container. For maximum compatibility, keep a copy of the original MP2 and verify the converted file in the target application.

If your goal is simple playback rather than editing, consider whether CAF is necessary; formats like WAV or AAC may be more broadly supported depending on your workflow. If you specifically need CAF for macOS audio production, the conversion is appropriate and preserves the audio in a modern container.