Convert MOV to AAC
Pull the sound out of your MOV and keep it as an AAC, leaving the picture behind. AAC is the usual choice for audio tracks inside MP4 video. The practical difference is that the result opens anywhere, which MOV files do not. Your file never leaves your computer.
How to convert MOV to AAC
- 1 Drop your MOV .mov or .qt file onto the page, or click to browse for it.
- 2 Choose the sound quality, or lift the existing track out untouched where that is possible.
- 3 Convert. The work happens on your own machine, so how long it takes depends on your computer and the file.
- 4 Download the AAC, or add more files and do the whole set in one go.
Why convert MOV to AAC
- An MOV will not open in a browser, so anything going onto a web page, into a document or into a message has to become an AAC first.
- You only want the sound: a lecture, an interview, a podcast that was filmed, or a track to listen to with the screen off.
- Better quality than MP3 at any comparable file size.
- Plays everywhere without draining the battery.
- Apple ecosystem music and podcasts.
MOV compared with AAC
How the two formats differ on the things that decide whether a conversion is worth making.
| Property | MOV | AAC |
|---|---|---|
| File extension | .mov | .aac |
| Compression | Lossy or lossless | Lossy |
| Transparency | Yes | No |
| Typical file size | Depends on mode | Smaller |
| Browser support | Some browsers | Every browser |
| Introduced | 1991 | 1997 |
| Developed by | Apple | ISO/IEC MPEG |
| Standard | Proprietary | Open |
Quality and what changes
Whether anything is lost depends on the codec. If the track already matches the target, it can be copied out untouched and the audio is bit for bit what was in the MOV. Choosing a different codec means decoding and re-encoding, which is a second generation of lossy compression on top of whatever the video already applied. Encoding at 192 kbps or above keeps that second generation inaudible for most material.
- One AAC limitation to keep in mind: patent licensing applies to encoders in commercial products.
Questions about MOV to AAC
Does extracting the audio re-encode it?
Only when the target codec differs from the one in the MOV. Where they match, the track is copied and the result is identical to the audio inside the video. Converting to a different codec means one extra generation of lossy compression.
Is my MOV file uploaded anywhere?
No. The whole thing runs inside the browser tab you already have open. Your MOV is read straight from your own disk, converted on your machine and handed back as an AAC. Nothing is sent anywhere, nothing is stored and there is no account.
Is there a file size limit?
There is no server-side limit because no server sees the file. The real ceiling is your device memory, since the input and the output both have to fit in the tab. A few hundred megabytes is usually fine on a desktop machine and considerably less on a phone.
Can I convert several MOV files at once?
Yes. Add as many as you like and they are processed one after another, then offered as separate AAC downloads or as a single ZIP. Speed depends on your own processor rather than on a queue.
Does the converter work offline?
Yes, after the page has loaded once. The engine is cached by the browser, so you can disconnect, reload and keep converting. That falls out of doing the work locally rather than being a separate mode you switch on.