Convert Core Audio Format (.caf) to Matroska Video (.mkv) online for free. Fast, secure audio conversion with no watermarks or registration.
Upload your .caf file by dragging it into the upload area or clicking to browse.
Choose your output settings. The default settings work great for most files.
Click Convert and download your .mkv file when it's ready.
CAF is Apple's professional audio container with unlimited codec support. MKV (Matroska Video) is the open-source multimedia container supporting virtually every audio and video codec. MKV is the standard for media servers (Plex, Jellyfin, Kodi) and personal media libraries.
Converting CAF to MKV wraps the audio inside the Matroska container, enabling integration with video production workflows, media server libraries, and multi-track audio files.
MKV provides cross-platform multimedia container support that CAF lacks. Converting CAF audio to MKV prepares it for muxing with video streams, adding subtitles, or building multi-track files. Media server software universally supports MKV.
MKV's chapter support, multiple audio tracks, and rich metadata make it the preferred container for complex multimedia projects. CAF's macOS-only limitation prevents its use in these cross-platform workflows.
FFmpeg reads the CAF container and transcodes the audio to a suitable codec within MKV (FLAC for lossless, AAC for compressed, Opus for web-optimized). MKV supports virtually every audio codec, so the choice depends on target device compatibility. The Matroska EBML structure supports chapters, multiple tracks, and extensive metadata.
Choosing FLAC within MKV preserves lossless quality from PCM/ALAC CAF sources. AAC at 256 kbps provides transparent compressed quality. Opus at 128 kbps delivers excellent quality with the smallest file size. The MKV container adds zero quality impact.
| Device | CAF | MKV |
|---|---|---|
| Windows PC | Partial | Partial |
| macOS | Partial | Partial |
| iPhone/iPad | Partial | Partial |
| Android | Partial | Partial |
| Linux | Partial | Partial |
| Web Browser | No |
Resolution: N/A
Bitrate: 320 kbps
OGG Vorbis preferred
Resolution: N/A
Bitrate: 256 kbps
AAC format required
Resolution: N/A
Bitrate: 128 kbps
Lossless FLAC/WAV for best quality
Resolution: N/A
Bitrate: 128 kbps
MP3 mono for spoken word
CAF to MKV moves macOS professional audio into the universal open-source container. Choose FLAC for lossless, AAC for compatibility, or Opus for efficiency.
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Yksityisyys ensin
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Aloita muuntaminen heti
Toimii kaikkialla
Mikä tahansa selain, mikä tahansa laite
| No |
| Ominaisuus | CAF | MKV |
|---|---|---|
| Koko nimi | Core Audio Format | Matroska Video |
| Tiedostopääte | .caf | .mkv |
| Paras käyttökohde | Apple native | Multiple audio tracks |