Significantly smaller files.
ALAC is a lossless format that prioritizes fidelity over size. Converting to AVI introduces modern compression that typically reduces file size by an order of magnitude with no perceptible difference at normal playback or viewing.
WHY CONVERT
01
ALAC is a lossless format that prioritizes fidelity over size. Converting to AVI introduces modern compression that typically reduces file size by an order of magnitude with no perceptible difference at normal playback or viewing.
02
AVI is the format most receiving systems expect for this kind of content. Converting upstream avoids the rejection and silent re-encoding that often happen when ALAC reaches an unprepared pipeline.
03
AVI files are typically smaller than their ALAC counterparts, which reduces hosting, transfer, and storage costs at scale. The savings compound when serving the same content to many recipients.
Visit this page on any modern browser — no install, no signup, no plugin.
Drag your ALAC into the drop area, or click to pick one from your device.
Conversion runs entirely in your browser. When it's done, your AVI file downloads to your device.
QUALITY & FIDELITY
FORMAT SPECS
| ALAC | AVI | |
|---|---|---|
| Extensions | .m4a .caf | .avi |
| MIME types | audio/alac | video/x-msvideo |
| Introduced | 2004 | 1992 |
| Maintainer | Apple | Microsoft |
| Magic # | — | 52 49 46 46 ?? ?? ?? ?? 41 56 49 20 |
| Spec | View spec ↗ | View spec ↗ |
COMPATIBILITY
| Platform | Windows | macOS | iOS | Android | Chrome | Firefox | Safari | Edge |
|---|---|---|---|---|---|---|---|---|
| AVI | Native | App | App | App | — | — | — | — |
Why LocalConvert
| Category | LocalConvert | Cloud converters |
|---|---|---|
| PRIVACY | Files never leave your device. The whole pipeline runs in your browser via WebAssembly. | Files travel to a remote server, sit in queue storage, and may be retained for analytics or moderation. |
| COST | Free, no signup, no daily quotas. | Often free for small files; paid tiers for batch / large / commercial use. |
| LIMITS | Limited only by your device's memory and CPU. Uncompressed WAV stems handled comfortably on desktop. | Typical 100 MB to 1 GB per-file caps, plus rate limits. |
Apple's lossless audio format inside an M4A container.
Typical uses
Apple Music lossless, iTunes lossless libraries.
A legacy Microsoft video container. Wide compatibility but inefficient by modern standards.
Typical uses
Older Windows video, legacy media.
Yes. LocalConvert is completely free, with no signup and no per-file or per-day limits.
No. ALAC to AVI conversion happens entirely inside your browser using WebAssembly — your file never leaves your device.
There's no fixed cap — the practical limit is your device's available memory. Very large files may take longer or fail on low-RAM devices.
Yes — once the page has loaded, ALAC to AVI conversion works without an internet connection. Re-open the page once to cache it.
LocalConvert uses the industry-standard tools (FFmpeg, ImageMagick, Pandoc) — quality matches what professionals use on the command line. Lossy formats will still lose some quality on each re-encode.
Last verified:
ALAC to AVI is processed in your browser with WebAssembly. No upload, no tracking, no limits. Your file never leaves your device.