Convert Matroska Video (.mkv) to Audio Interchange File Format (.aiff) online for free. Fast, secure video conversion with no watermarks or registration.
Conversion settings — add a file to adjust
Upload your .mkv 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 .aiff file when it's ready.
AIFF (Audio Interchange File Format) is Apple's uncompressed audio standard, used extensively in professional music production on macOS. Converting MKV to AIFF extracts the audio track and stores it as raw PCM data, preserving every sample without any lossy compression artifacts.
Professional audio engineers working in Logic Pro, GarageBand, or Pro Tools on macOS often require uncompressed audio for mixing and mastering. AIFF provides bit-identical PCM audio wrapped in a metadata-rich container that integrates seamlessly with Apple's professional audio ecosystem, including loop markers, instrument data, and comments fields that WAV does not support.
When extracting audio from MKV video recordings of live performances, studio sessions, or field recordings, converting to AIFF ensures zero quality loss regardless of the source codec. Even if the MKV contains lossy audio (AAC, Opus), the AIFF output preserves that quality ceiling without introducing additional compression artifacts that a second lossy encoding would cause.
FFmpeg decodes whatever audio codec the MKV contains and outputs raw PCM samples in big-endian format (the AIFF standard). Sample rates are preserved from the source, typically 44.1 kHz or 48 kHz, with bit depths up to 24-bit or 32-bit float depending on the source. If the MKV has surround audio (5.1 or 7.1), all channels are preserved in the AIFF output unless downmixing is explicitly requested.
AIFF is uncompressed, so the output quality exactly matches the decoded source audio. If the MKV contains lossless audio (FLAC, ALAC, PCM, TrueHD), the AIFF is a perfect replica. If the source audio was lossy, the AIFF faithfully captures the already-decoded samples without adding further degradation. Expect file sizes roughly 10 MB per minute at 44.1 kHz stereo 16-bit.
| Device | MKV | AIFF |
|---|---|---|
| Windows PC | Partial | Partial |
| macOS | Partial | Partial |
| iPhone/iPad | Partial | Partial |
| Android | Partial | Partial |
| Linux | Partial | Partial |
| Web Browser | No |
Resolution: 1920x1080
Bitrate: 8-12 Mbps
H.264 recommended for fast processing
Resolution: 1080x1080
Bitrate: 3.5 Mbps
Square or 9:16 for Reels
Resolution: 1080x1920
Bitrate: 4 Mbps
9:16 vertical, under 60s ideal
Resolution: 1280x720
Bitrate: 5 Mbps
Under 140s, 512MB max
Resolution: 960x540
Bitrate: 2 Mbps
16MB limit for standard, 64MB for document
Resolution: 1280x720
Bitrate: 4 Mbps
MKV to AIFF is the right choice when you need uncompressed audio from video files for professional production workflows on Apple hardware and software.
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| Caracteristică | MKV | AIFF |
|---|---|---|
| Nume complet | Matroska Video | Audio Interchange File Format |
| Extensie | .mkv | .aiff |
| Cel mai potrivit pentru | Multiple audio tracks | Lossless quality |