AVI to AIFF Converter

Extract AVI Audio to AIF Online

This tool takes the soundtrack out of an .avi video and writes it as an .aif file — Apple's uncompressed AIFF audio, the format Logic Pro, GarageBand, Pro Tools and most Mac audio software import without complaint. The video track is discarded; what you download is audio only. .aif and .aiff are two spellings of the same Apple format, so this page and AVI to AIFF do the same job with a different extension on the result.

How to Convert AVI to AIF

1. Upload Your AVI File: Drag your .avi onto the page or click "+ Add Files" to browse for it. Several clips can be queued and they all run with the same settings.
2. Choose the Audio Codec: Open Advanced Options. Audio Codec defaults to PCM 16-bit Big Endian, which is what "AIFF" means in the classic sense — keep it unless a specific system asked for something else. The alternatives are PCM 16-bit Little Endian, PCM A-law and PCM mu-law.
3. Set Sample Rate, Channels or Trim (Optional): Audio Sample Rate offers Original (a straight transfer of whatever the AVI holds) plus fixed 8000–48000 Hz rates; Audio Channel offers Original, Mono or Stereo; and Trim exports only a start-time-and-duration window, while "Unchanged" writes the whole track.
4. Convert and Download: Click "Convert" and save the .aif. Files are uploaded over an encrypted connection, converted on our servers, and deleted automatically after a few hours — no sign-up, no watermark.

AIF Format at a Glance

What Each Audio Codec Option Actually Writes

The codec dropdown does more than change compression — it changes the form type stored inside the file, which is why one of these choices is meaningfully "more AIFF" than the others.

Running the same codec settings the converter applies, a 10-second 44.1 kHz stereo soundtrack wrote 1.77 MB as 16-bit big-endian PCM and 0.88 MB as A-law — and only the first file carried the plain AIFF form type; the other three were AIFC.

Frequently Asked Questions

Does converting AVI to AIF keep the video?

No. This is an audio-extraction tool. The AVI's video stream is decoded only far enough to reach the audio, and the file you download contains sound alone — there is no picture in an AIFF file, because the format has no video stream type. If you want the whole clip in a different wrapper, that is a video-to-video job such as AVI to MP4.

Will the AIF sound better than the audio inside my AVI?

No, and it cannot. Most AVI files carry lossy audio — MP3 and AC-3 were the common pairings during the DivX/Xvid era — and the detail that encoder discarded is gone for good. Decoding that to uncompressed PCM captures exactly the waveform your player already produces, then stores it without further loss. The one case where the transfer is genuinely lossless end to end is an AVI that already held uncompressed PCM, because nothing is re-compressed on the way out.

Why is my AIF so much bigger than the whole audio track was?

Because uncompressed PCM has a fixed cost per second: 44.1 kHz, 16-bit, stereo is 176,400 bytes every second, about 10.6 MB per minute, regardless of what the content sounds like. A 128 kbps MP3 track inside the AVI runs at 16,000 bytes per second — roughly eleven times smaller. The extra bytes in the AIF are storage overhead, not added fidelity. If size matters more than editability, AVI to MP3 is the right target instead.

Is .aif the same file as .aiff?

Yes — byte for byte. The three-letter spelling survives from DOS-era 8.3 filename limits, and Apple's format is the same underneath. A file written here as .aif is identified by media tools as AIFF, and macOS, Logic Pro, GarageBand and QuickTime open both spellings without conversion. If a system specifically demands the four-letter extension, use AVI to AIFF, which produces the identical bytes.

When should I pick WAV instead of AIF?

When the file is going anywhere other than a Mac-centric audio tool. WAV and AIFF are both uncompressed PCM with essentially identical audio quality; the differences are byte order (WAV is little-endian, AIFF big-endian) and ecosystem — WAV is the default in Windows tools, hardware samplers, game engines and most upload forms that accept "uncompressed audio". Use AVI to WAV for those, and AIF when your destination is Logic, GarageBand or a Mac sample library.

What does the AIFF-C option do, and should I use it?

AIFF-C (AIFC) is the 1991 extension of AIFF that allows compressed and byte-swapped sample data. On this page any codec other than PCM 16-bit Big Endian writes an AIFF-C form inside your .aif file, which modern software reads fine but a few legacy AIFF-only tools reject. Pick A-law or mu-law only when you deliberately want half-size 8-bit audio; if you want AIFF-C with its own extension, AVI to AIFC writes .aifc instead.

Can I extract just one section of the soundtrack?

Yes. Set Trim away from "Unchanged" and enter a start time plus a duration, in seconds or as HH:MM:SS.sss. Only that window is decoded and written, which also keeps the uncompressed output small — an uncompressed 30-second excerpt is about 5.3 MB, versus roughly 106 MB for a full ten-minute track at CD quality.

Should I change the Audio Sample Rate?

Usually not. Leaving it on Original copies the AVI's own rate — normally 44,100 or 48,000 Hz — and avoids a resampling step, which can only ever approximate, never improve. Pick 48000 HZ when the file is going back into a video timeline that runs at 48 kHz, since matching the project rate avoids a conversion later. Choose one of the lower rates only when a sampler, embedded device or telephony system documents it, and remember the file size scales directly with the rate: 24,000 Hz stereo PCM is about 55% of the bytes of the same audio at 44,100 Hz.

What happens to my AVI after the conversion?

It is uploaded over an encrypted connection, converted on our servers, and both the upload and the AIF result are deleted automatically after a few hours. Nothing is shared or made public, and no account is needed. The practical limit on a large AVI is upload time rather than processing time, so trimming to the section you need before converting is the fastest route.