Is this AVI to M4A converter really free?

Yes. Up to 5 files at a time, no signup, no catch. The free tier adds a small watermark to image output — Pro ($9.99/mo or $49/yr) removes it, raises the file size limit to 500 MB, and unlocks unlimited batch conversion.

Are my files uploaded to a server?

No — and you can verify it yourself. Open DevTools → Network tab, then convert a file. You'll see zero upload requests. Everything runs right in your browser. We never see your files.

How long does conversion take?

Usually 1–3 seconds for a typical file. The very first conversion on a fresh page load may take 5–20 seconds while the converter engine loads — after that it's instant. Your CPU does all the work locally.

What is the file size limit?

Free: up to 10 MB per file, 5 files per batch. Pro: up to 500 MB per file, unlimited batch. If you're working with large videos or RAW photos, Pro is built for that.

Can I batch convert multiple AVI files at once?

Yes — drop multiple files at once (or Ctrl/Cmd+click to select them) and they all convert in parallel. Free accounts handle up to 5 files per batch; Pro has no limit.

What bitrate will the converted audio use?

We default to 192 kbps for MP3, 128 kbps for OGG/Opus, and 320 kbps for M4A/AAC. These settings are perceptually transparent — most listeners can't tell the difference in a blind test.

Will my metadata (ID3 tags, album art) be preserved?

Yes, when both formats support it. Tags carry over on conversions like MP3→M4A or FLAC→MP3. WAV has limited tag support, so some metadata may not transfer.

Will the M4A from an AVI play on my iPhone without issues?

Yes — M4A is Apple's native audio format and plays on every Apple device. The extracted audio is re-encoded to AAC and wrapped in an M4A container.

Can I choose the quality of the M4A output?

The default output is 192 kbps AAC in M4A, which is high quality for music. For podcasts or voice, 128 kbps is sufficient.

How private is this converter?

Completely private — by design, not policy. There is no upload endpoint. Files are processed right inside your browser tab and disappear the moment you close it. We collect only anonymous page-view counts; your file content is never seen or stored.

AVI to M4A Converter — Free, Online, No Upload

How to convert AVI to M4A online

1
Drop your AVI file
Drag and drop your Audio Video Interleave file onto the converter, or click to browse your files. You can select up to 5 at once. Nothing leaves your device — conversion happens right here in the browser.
2
Hit Convert — it happens locally
Click Convert and watch it go. There's no upload, no server queue, no waiting. The converter runs Audio Video Interleave → MPEG-4 Audio entirely in your browser tab. Most files finish in 1–3 seconds.
3
Download your M4A
Your MPEG-4 Audio file is ready. Click Download, or grab a ZIP if you converted a batch. Close the tab and everything disappears — no copies kept anywhere.

AVI vs M4A: format overview

AVI

Audio Video Interleave

Microsoft · 1992

Compression: lossy
Transparency: No

✓ Universal Windows compatibility
✓ Simple container format — widely supported
✗ Large file sizes (minimal compression)

M4A

MPEG-4 Audio

Apple / MPEG Group · 2001

Compression: lossy
Transparency: No

✓ Better quality than MP3 at same bitrate (AAC codec)
✓ Native Apple ecosystem support

AVI magic bytes: 52 49 46 46 xx xx xx xx 41 56 49 20

M4A magic bytes: 00 00 00 xx 66 74 79 70 4D 34 41

Why convert AVI to M4A?

Old AVI files from home cameras, DVD rippers, and legacy capture hardware do not belong in Apple's ecosystem. iTunes ignores them, iOS cannot play them, and the Apple Music app has no way to index them. Yet some of the most valuable recordings people want to preserve — recitals, family videos, interview audio — are locked inside AVI containers from years past.

M4A is the native audio format for every Apple product. It is AAC audio inside an MPEG-4 container, exactly the format that iTunes uses for purchased music and Apple Music uses for streaming. It supports metadata, cover art, and chapter markers in the way Apple devices expect. AirPlay, HomePod, CarPlay, and the Apple TV app all treat M4A as a first-class format.

This converter extracts the audio from your AVI file and packages it as M4A, ready to import directly into iTunes or Apple Music. The audio is encoded at quality suitable for music and voice, and the file size is compact — typically 4–8 MB per minute. Once converted, your old recordings can live permanently in your Apple library, sync to your iPhone, and play on any Apple device without any additional steps.

Quality & file size: AVI to M4A

Typical file sizes: AVI 200–600 MB → M4A 3–6 MB.

Both AVI and M4A use lossy compression. We transcode at high quality settings (equivalent to M4A's recommended web quality) to minimize generational loss.

Color depth: AVI supports standard color, M4A supports standard color.

Transparency: AVI does not support transparency. M4A does not support transparency — transparent areas become solid white.

Frequently asked questions

Privacy: how FormatDrop handles your files

Your AVIfiles are converted 100% inside your browser. They are never uploaded to our servers, never stored, and never seen by anyone other than you. This isn't a privacy policy claim — it's an architectural guarantee: our server has no endpoint that receives file bytes.