AVI to M4A Converter

Extract AVI Audio to M4A Online

This tool pulls the audio track out of an AVI video and saves it as an M4A file — an MPEG-4 audio container that holds AAC, the codec Apple uses for iTunes and Apple Music. Use it when you want just the soundtrack, narration, or music from a clip without the video, in a format that plays natively across Apple devices and most modern players. Because AVI almost always stores its audio as MP3, AC3, or PCM, the conversion re-encodes that track to AAC rather than copying it untouched, so pick a bitrate that matches the source quality (see the table below).

How to Convert AVI to M4A

1. Upload Your AVI File: Drag and drop your AVI onto the page or click "+ Add Files" to browse. You can queue several clips at once.
2. Set the Quality Preset: Open Advanced Options and choose a Quality Preset (the default is Highest). This controls the AAC bitrate of the M4A output.
3. Trim or Adjust Channels (Optional): Use Trim to keep only a portion of the audio, or change the Audio Channel and Audio Sample Rate from their original values if you need mono or a specific rate.
4. Convert and Download: Click "Convert" and download your M4A. No sign-up, no watermark.

M4A (AAC) vs MP3 — Which Should You Extract To?

Both are lossy, but AAC was designed to deliver higher fidelity than MP3 at the same bitrate, so M4A is the better pick for Apple devices and quality-sensitive listening. MP3 wins only when you need the broadest possible playback compatibility.

If compatibility matters more than efficiency, extract the audio to MP3 instead. Already have M4A files you need elsewhere? Convert M4A to MP3 for older players.

Frequently Asked Questions

Will converting AVI to M4A improve the audio quality?

No. The audio inside an AVI is already encoded (usually as MP3, AC3, or PCM), and extracting to M4A re-encodes it to AAC. Re-encoding from one lossy format to another can only preserve or slightly reduce quality, never add detail back. To keep the result as close to the source as possible, choose the highest Quality Preset and a bitrate at or above the original track's bitrate.

What bitrate should I pick for the M4A?

Match or modestly exceed the source. AAC at 256 kbps is roughly transparent for music and is the bitrate the iTunes Store uses; 128 kbps is fine for speech, podcasts, and narration. AAC supports bitrates up to 512 kbps, but going far above the original track's bitrate just makes a larger file without recovering any lost detail. In our testing, a 5-minute AVI with a 192 kbps MP3 audio track produced an M4A of roughly 9 MB at the 256 kbps preset.

Does the M4A keep the video from the AVI?

No. M4A is an audio-only container, so the output contains just the soundtrack. If you want to keep the picture, convert the whole file to a video format such as AVI to MP4 instead of extracting audio.

Is M4A the same thing as AAC?

Not exactly. M4A is the file container (MPEG-4 Part 14, ISO/IEC 14496-14), and AAC is the audio codec stored inside it. Almost all M4A files in everyday use contain AAC, though the container can also hold Apple Lossless (ALAC). This converter writes AAC.

Will the M4A play on Android and Windows?

Yes in most cases. M4A plays natively on Apple devices and is widely supported on Windows (Windows Media Player, Groove) and Android, as well as in players like VLC. AAC support in web browsers is less universal than MP3, so if you need a file that plays absolutely everywhere, MP3 is the safer choice.

Is the conversion private and free?

Yes. It is free with no watermark and no sign-up. Your file is uploaded over an encrypted connection, processed on our servers, and deleted automatically a few hours after conversion — never shared or made public.