MKV to AIFF Converter

Extract MKV Audio to AIF Online

Pull the soundtrack out of an .mkv video and save it as an .aif audio file — uncompressed PCM that drops straight into Logic Pro, GarageBand, and other Apple audio tools. The video is discarded; you keep only the audio. Note that .aif and .aiff are the same Apple AIFF format under two spellings, so this page and the MKV to AIFF page produce byte-identical output.

How to Convert MKV to AIF

1. Upload Your MKV File: Drag and drop your .mkv onto the page, or click "+ Add Files" to browse. Queue several clips and they convert in one batch with the same settings.
2. Set the Audio Sample Rate: Open Advanced Options and leave Audio Sample Rate on "Original" for a 1:1 transfer of the source audio, or pick a specific rate only if a target sampler or device requires one.
3. Set the Audio Channel or Trim (Optional): Leave Audio Channel on "Original" to keep the source layout, or force Mono/Stereo. Set Trim (default "Unchanged") to export only a start-and-duration window instead of the whole track.
4. Convert and Download: Click "Convert" and download your AIF file. No sign-up, no watermark.

MKV Audio vs AIF Output at a Glance

Frequently Asked Questions

Does converting MKV to AIF keep the video?

No. This is an audio-extraction tool: it reads the audio track out of the MKV, writes it to an AIF file, and discards the video entirely. The output has no picture. If you need to keep the video and only change the container or codec, that is a video-to-video conversion, not this one.

Will the AIF sound better than the audio in my MKV?

No. Most MKV files carry lossy audio — commonly AAC, AC-3, or DTS — which permanently dropped some detail when it was first encoded. Decoding that to uncompressed PCM and wrapping it in AIF stores the samples your player already produces; it cannot reconstruct what was removed. The AIF sounds the same as the MKV's audio, just in a larger, uncompressed container. The one exception is an MKV that already held FLAC or raw PCM — common on archival rips and music releases — in which case the transfer is genuinely lossless because nothing is re-compressed.

Why is my AIF so much larger than the MKV's audio track?

Because the AIF here is uncompressed. AAC, AC-3, or DTS inside an MKV shrinks audio by roughly an order of magnitude versus raw PCM, while AIF writes every sample out in full at 16-bit. CD-quality stereo PCM runs about 10 MB per minute, so a compact compressed soundtrack commonly expands several-fold. The extra bytes are uncompressed data, not added fidelity. If you want a small file, use MKV to MP3 instead.

Is .aif the same as .aiff?

Yes — the bytes inside are identical. Apple specified the format as AIFF in January 1988, but DOS-era and cross-platform tools were limited to three-letter extensions, so .aif became the common spelling for the very same file. macOS, Logic Pro, and GarageBand read both interchangeably. In our testing, a one-minute MKV with a 192 kbps AAC track produced an AIF of roughly 10 MB — far larger than the source audio, exactly because the output is uncompressed PCM. If you specifically need the four-letter extension, the MKV to AIFF page does the same conversion; for the standard uncompressed editor format on non-Apple systems, MKV to WAV is more widely supported.

How are my files handled, and how long do you keep them?

Files are uploaded over an encrypted connection, processed on our servers, and deleted automatically a few hours after conversion — no sign-up, no watermark, never shared or made public.