Step 1: Import your MKV files using the button above or by shift and land.
Step 2: Click the 'Transform' button to start the transformation.
Step 3: Capture your converted AIFF files.
MKV to AIFF Transformation FAQ
How do I extract the audio from a MKV file as AIFF?
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Upload the MKV file and we demux the audio track, then transcode to AIFF. There is no second video pass and no quality loss beyond the AIFF codec itself.
What audio bitrate does the AIFF file use?
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Default AIFF bitrate is 192 kbps (transparent for music). You can override to 320 kbps (audiophile) or 96-128 kbps (voice / podcast / smaller file). The choice is exposed in the advanced options.
Will I lose audio quality going from MKV to AIFF?
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If the AIFF format is lossless (WAV, FLAC), you keep every sample exactly. If AIFF is lossy (MP3, AAC, OGG), the AIFF codec recompresses — quality depends on the bitrate and source audio. We default to 192 kbps which is transparent for almost all content.
Does the extracted AIFF keep the original sample rate?
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By default yes — a 48 kHz audio track in MKV becomes 48 kHz in AIFF. If you need 44.1 kHz (CD-quality) for compatibility with older players, the advanced options include a sample-rate dropdown.
Can I extract audio from multiple MKV files to AIFF in one batch?
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Yes — drop a folder of MKV files in and we extract audio in parallel. Premium users get more parallel workers; on a 50-file batch this is the difference between 90 seconds and 8 minutes.
Will the AIFF file be tagged with title / artist / album?
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If the MKV file has chapter or stream metadata, we copy artist / title / album fields into the AIFF container. Otherwise the AIFF file is untagged — use a tag editor (Mp3tag, Picard) post-export if you need richer tags.
How long does extracting AIFF from a MKV file take?
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Audio extraction is much faster than video re-encoding — typically 5-15% of the source duration. A 1-hour MKV → AIFF finishes in 3-9 minutes on the standard pipeline.
Can I extract just a section of the MKV audio as AIFF?
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Not in this tool — extract the full audio as AIFF here, then use /audio-trim/ or /audio-cutter/ to clip the section. The two-step path is usually faster than a combined operation.
Is my MKV file private during audio extraction?
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Yes — same privacy model as every conversion: isolated workers, automatic deletion within minutes, no human review of content. See /privacy/.
Why does my AIFF file have silent gaps?
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Silent gaps usually mean the MKV file had a multi-track audio layout and we picked the wrong stream. Use the advanced "audio stream" option to explicitly pick stream 0, 1, etc., or re-mux all streams to a multi-track AIFF container if AIFF supports it.
Can the AIFF extraction be stereo / mono / 5.1?
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Channel layout is preserved from MKV by default — a 5.1 MKV produces a 5.1 AIFF where the codec supports it (AAC, FLAC, OGG). You can force stereo or mono via the channel-downmix option, useful for podcast workflow.
Does the extracted AIFF play on iPhone / Android / car stereo?
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MP3 plays everywhere. AAC / M4A plays on Apple and most Android. OGG / Opus needs a recent player on iOS. The advanced options expose a "device" preset that picks the AIFF codec most likely to play on your target.