Convert AIFF to M4A online
Free, no sign-up, no limits. Drop your AIFF files, get M4A files back in seconds.
1 files converted so far
Drop your AIFF files here
or · multiple files accepted
Local conversion: your files never leave your device.
Why convert AIFF to M4A?
You have a large AIFF file (studio recording, software export, CD archive) and you want a small M4A to listen to on your phone, send by email or publish online. Choose 256 or 320 kbps to keep excellent quality.
How to do it, step by step
- Drop your AIFF 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: M4A is already selected. For music, 192 kbps is transparent for most listeners and 320 kbps gives the maximum. For voice (memos, podcasts, lectures), 128 kbps is more than enough and halves the file size.
- 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 M4A, directly or as a .zip if you converted several files. The name and metadata (title, artist, cover art) are preserved.
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
The M4A format (MPEG-4 Audio)
M4A is Apple's audio container, used by iTunes, Apple Music, iPhone voice memos and Mac recordings. It usually holds AAC audio, sometimes ALAC (lossless). Very good quality at a small size, but poorly supported by some car stereos, MP3 players, Windows software and websites.
- Excellent quality at the same bitrate
- Native Apple format (iPhone, Mac, iTunes)
- Can hold lossless audio (ALAC)
- Limited compatibility outside the Apple ecosystem
- Rejected by many car stereos and older devices
- Less universal than MP3
AIFF vs M4A comparison
| AIFF | M4A | |
|---|---|---|
| Compression | Lossless | Lossy |
| Typical size (1 min, music) | ≈ 10 MB | ≈ 1.2 MB (160k) |
| Common use | Logic Pro, GarageBand, mastering | iPhone voice memos, iTunes purchases, GarageBand recordings, Mac Voice Memos |
| Metadata (title, cover art) | Yes | Yes |
Frequently asked questions
Does converting AIFF to M4A lose quality?
M4A is a lossy compressed format: a conversion always involves re-encoding. At 192 kbps or higher, the difference is inaudible in the vast majority of cases. Just avoid chaining several successive conversions.
Is the AIFF to M4A 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 AIFF files uploaded to the internet?
No. The AIFF to M4A conversion is performed by FFmpeg directly in your browser (WebAssembly). Your files never leave your computer or phone.
How do I convert AIFF to M4A on iPhone or Android?
Open this page in Safari or Chrome, tap the drop area, select your AIFF file (from Files, Voice Memos, Downloads or WhatsApp), then tap "Convert". The M4A downloads to your files.
Can I convert several AIFF 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.