Step 1: Provide your MKV files using the button above or by toss and let go.
Step 2: Click the 'Convert' button to start the conversion.
Step 3: Fetch your converted AIFF files.
MKV to AIFF Conversion FAQ
How do I extract just the audio track from MKV as AIFF?
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Upload the MKV file and the converter demuxes the audio stream from the MKV container, then transcodes it into AIFF. Video frames are discarded — no second video pass, no quality loss beyond what the AIFF codec itself introduces. MKV is Matroska, an open container designed in 2002 with no licensing restrictions and no ceiling on what it can hold. AIFF is Apple’s Audio Interchange File Format from 1988, built on the same IFF chunk design as AVI’s RIFF.
Does converting MKV to AIFF improve the audio quality?
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No, and it is worth being blunt: nothing can. The MKV already discarded detail during its original encode, and wrapping what remains in a lossless AIFF preserves exactly that — no more. The file gets several times larger and sounds identical. It is still the right move before editing, because AIFF will not add a second generation of artefacts when you export. AIFF is the studio interchange format on macOS, handles metadata better than plain WAV, and imports into Logic and Pro Tools instantly. MKV has almost no native hardware support — phones, browsers and TVs usually need VLC or a remux before they will play it.
Can I tag the AIFF with artist and album information?
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Yes, and it is a genuine gain over MKV, which has nowhere dependable to store any of it. AIFF carries title, artist, album, year, track number and embedded cover art in the container itself, so a music library files it correctly without a manual pass.
Which audio track gets extracted when my MKV has several?
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One track, picked automatically: normally the main one, the track with the most channels. This page has no setting to choose a different track and does not list the tracks in the file. If you need commentary or a dub instead, remux the MKV with that track first (VLC or ffmpeg can do this) and convert it again.
What bitrate does the AIFF file use?
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A lossy AIFF is encoded at 192 kbps by default. The Audio Quality setting also offers 320 kbps for the best quality and 128 kbps for a smaller file. A lossless AIFF (WAV, FLAC) ignores the bitrate and keeps every sample. AIFF stores uncompressed big-endian PCM — the Apple-side equivalent of WAV, with the same bit-for-bit fidelity.
Will going from MKV to AIFF reduce my audio quality?
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If the AIFF format is lossless (WAV, FLAC, ALAC), every original sample is preserved. If AIFF is lossy (MP3, AAC, OGG, Opus), the codec recompresses — at 192 kbps the difference is inaudible for most content; at 96 kbps you may hear cymbals or sibilants softening. The MKV container has no influence on this — only the codec settings matter.
Does the extracted AIFF keep the MKV sample rate?
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By default yes — 48 kHz MKV audio becomes 48 kHz AIFF audio, 44.1 kHz becomes 44.1 kHz. If you need to downsample for compatibility (e.g. 96 kHz studio masters to 44.1 kHz CD-quality AIFF) the sample-rate dropdown does this with high-quality resampling.
Can I batch-extract AIFF audio from a folder of MKV files?
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Several files in one job need a paid plan. Free use is one file per conversion, one conversion an hour. On a paid plan you can add several files to one job, then download each result on its own or all of them in one ZIP.
How long does extracting AIFF from a 1-hour MKV take?
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It depends on the size and length of the file. Small documents and images are usually ready quickly. Long videos take the longest, because most video conversions re-encode every frame.
Is my MKV private during audio extraction?
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Yes. Uploaded MKV files are processed on our own conversion servers, no person reviews them, and they are never shared. The upload and the converted AIFF are both deleted automatically about 24 hours after the conversion, which leaves time to download the result. See /privacy/ for the full policy.
Why does my AIFF have silent gaps or wrong audio?
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Usually the MKV carries more than one audio track and the one that was converted is silent or secondary. The converter picks one audio track automatically, normally the main one, and this page has no setting to choose a different track. If the wrong one comes out, remux the MKV with the track you want first (VLC or ffmpeg can do this) and convert it again.
