Convert MP4 to AIFF online
Free, no sign-up, no limits. Drop your MP4 files, get AIFF files back in seconds.
1 files converted so far
Drop your MP4 files here
or · multiple files accepted
Local conversion: your files never leave your device.
Why convert MP4 to AIFF?
You want to keep only the sound of a video: lecture, concert, course, interview, the music from a clip. The resulting file is 10 to 20 times smaller and plays on any player.
How to do it, step by step
- Drop your MP4 fileinto the area at the top of the page (or several files at once). On mobile, tap the area and pick the file from your apps.
- Check the output format: AIFF is already selected. AIFF is a lossless format: there is no quality setting, the sound is reproduced identically. The file will be noticeably larger than a compressed format.
- Start the conversion.The FFmpeg engine loads once (≈ 10 MB), then each file is processed in a few seconds without leaving your device.
- Download your AIFF, directly or as a .zip if you converted several files. The name and metadata (title, artist, cover art) are preserved.
The MP4 format (MPEG-4 (video audio track))
MP4 is a video file. Extracting its audio track lets you keep only the sound of a lecture, a concert, an interview or a personal video, in a much smaller file you can listen to anywhere.
- Universal video format
- Large
- Pointless when only the sound matters
The AIFF format (Audio Interchange File Format)
AIFF is Apple's equivalent of WAV: uncompressed audio, perfect quality, large files. It is produced by Logic Pro, GarageBand and iTunes (CD import as AIFF). Outside the Mac, it often causes playback problems.
- Lossless quality
- Supports metadata (unlike WAV)
- Very large
- Rarely played outside the Mac
MP4 vs AIFF comparison
| MP4 | AIFF | |
|---|---|---|
| Compression | Lossy | Lossless |
| Typical size (1 min, music) | ≈ 20–100 MB | ≈ 10 MB |
| Common use | smartphone videos, lectures, concerts, online courses | Logic Pro, GarageBand, mastering |
| Metadata (title, cover art) | Yes | Yes |
Frequently asked questions
Does converting MP4 to AIFF lose quality?
No: AIFF is a lossless format. The sound of the converted file is strictly identical to that of the original MP4, but the quality already lost during MP4 compression is not recovered.
Is the MP4 to AIFF converter free?
Yes, with no limit on the number of files, no sign-up and no watermark. Each file can be up to 200 MB.
Are my MP4 files uploaded to the internet?
No. The MP4 to AIFF conversion is performed by FFmpeg directly in your browser (WebAssembly). Your files never leave your computer or phone.
How do I convert MP4 to AIFF on iPhone or Android?
Open this page in Safari or Chrome, tap the drop area, select your MP4 file (from Files, Voice Memos, Downloads or WhatsApp), then tap "Convert". The AIFF downloads to your files.
Can I convert several MP4 files at once?
Yes, add all your files in one go. They are converted one after another and a button lets you download everything as a .zip archive.