Convert Audio Interchange File Format (.aif) to Matroska Video (.mkv) online for free. Fast, secure audio conversion with no watermarks or registration.
Upload your .aif 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.
AIF is Apple's uncompressed PCM audio format from 1988, storing big-endian audio data in an IFF-based container designed for professional use on classic Mac OS. MKV (Matroska Video) is an open, flexible multimedia container developed by the Matroska project, capable of holding virtually any combination of video, audio, subtitle, and metadata tracks in a single file.
Converting AIF to MKV places audio content inside a video container. Since AIF contains only audio, the resulting MKV file will be audio-only — no video stream is generated. Matroska is particularly suited for this because it supports virtually every audio codec (PCM, FLAC, AAC, Opus, Vorbis, MP3) and preserves rich metadata including chapter markers and tags.
MKV is the preferred container for complex media projects. Converting AIF to MKV is useful when assembling a Matroska project where audio tracks need to be in the same container format as other media assets. Video editors, media servers like Plex and Jellyfin, and Matroska-based workflows may require all assets in MKV format.
MKV also offers superior metadata capabilities over AIF — chapter markers, multiple audio tracks, tags, and attachments (like cover art as separate files). For long-form content like audiobooks, lectures, or concert recordings, MKV's chapter system provides precise navigation that AIF's simpler container cannot match.
FFmpeg reads the AIF container's big-endian PCM stream and writes it into an MKV (Matroska) container. The audio can be stream-copied as PCM (lossless), or re-encoded to FLAC (lossless compression), AAC, Opus, or Vorbis. Matroska's flexible codec support means virtually any audio format can be embedded. The MKV container adds EBML header, track entries, cluster blocks for audio frames, and optional chapter/tag elements. Byte order conversion from big-endian to little-endian occurs automatically if PCM output is selected.
If audio is stream-copied as PCM or encoded to FLAC, quality is perfectly lossless — every sample from the AIF source is preserved identically. If re-encoded to AAC, Opus, or Vorbis, standard lossy compression quality applies. The MKV container introduces zero quality degradation regardless of the audio codec used.
| Device | AIF | 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
AIF to MKV wraps Apple's uncompressed audio in the versatile Matroska container. The result is audio-only with support for chapters, rich metadata, and virtually any codec. Use FLAC encoding for lossless compression within MKV.
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| No |
| Funktion | AIF | MKV |
|---|---|---|
| Fulde navn | Audio Interchange File Format | Matroska Video |
| Filendelse | .aif | .mkv |
| Bedst til | Lossless quality | Multiple audio tracks |