Convert AVI to AAC
Free online converter for AVI files. Efficient successor to MP3 used in broadcast and streaming. Nothing to install, no watermark, and every file is deleted automatically.
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Upload a AVI file to convert it to AAC. Up to 3 files at once, 100 MB each.
Free · up to 3 files · 100 MB each · files deleted automatically after 1 hour.
About AVI and AAC
AVI .avi
A Microsoft container from 1992. Still readable everywhere, but it predates modern streaming, subtitles and variable bitrate audio.
Good for
- Opens in very old software
- Simple, well-understood structure
Trade-offs
- Much larger than MP4 for the same quality
- No native subtitle support
- Poor handling of variable bitrate audio and modern codecs
video/x-msvideo
AAC .aac
MP3's designated successor, and the default in the Apple ecosystem and most streaming services. Better sound than MP3 at the same bitrate.
Good for
- Noticeably better than MP3 at equal bitrates
- The default across Apple devices and most streaming
- Handles multichannel audio properly
Trade-offs
- Lossy
- Patent licensing is more involved than Opus or Vorbis
audio/aac
AVI and AAC side by side
| AVI | AAC | |
|---|---|---|
| Compression | Container — usually older codecs | Lossy |
| Transparency | No | n/a |
| Typically used for | Legacy video files | Streaming, Apple devices, video soundtracks |
What changes when you convert AVI to AAC
Only the sound is kept
This takes the audio track out of the AVI and writes it as AAC. The picture is discarded entirely, and no conversion back will return it — keep the AVI if you still need the video.
This is a re-encode, not a repackage
Some tools can move a stream into a different container untouched when the codecs happen to line up. We do not — every job here is decoded and encoded again, so the conversion takes time in proportion to the length of the file and costs a small amount of quality even where a repackage would have been possible. In exchange the output is predictable: it plays everywhere, rather than inheriting whatever the source happened to contain.
What your AAC will contain
The output is AAC — at 192 kbps, written as a raw ADTS stream rather than wrapped in a container. AAC is meaningfully better than MP3 at the same bitrate, which is why it became the default for streaming and broadcast. If you want tags and artwork to travel with it, choose M4A instead — the same audio in a container that has somewhere to put them.
Other AVI conversions
Other ways to get AAC
Worth reading next
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