Convert AIFF to M4A
Turn a large AIFF into a compact AAC file that fits the Apple ecosystem. The conversion runs in your browser, so your file is never uploaded.
Why convert AIFF to M4A?
M4A wraps AAC audio in an MP4 container, and it is the native format across iTunes, Apple Music, and iPhone voice memos. If your AIFF came out of Logic Pro or an old macOS library, M4A keeps it comfortably at home on Apple devices while cutting the size dramatically. It is a good pick when you want tighter files than MP3 at the same bitrate, especially for spoken word or lower-bitrate music. For anything living mainly in the Apple world, M4A is the tidy, space-saving choice.
Quality and file size
This is a lossy conversion: AAC re-encodes the audio and discards data to shrink the file, so it will not match the AIFF bit-for-bit. AAC is efficient, though, and often sounds better than MP3 at the same bitrate, particularly below 192 kbps. Choose 256 or 320 kbps if you want the encode to be transparent to most ears. One caveat: M4A is very well supported on modern gear but slightly less universal than MP3 on old cars and cheap players, so keep the AIFF master if maximum compatibility matters.
AIFF to M4A: common questions
Is M4A better than MP3 for this?
At the same bitrate AAC (M4A) is usually more efficient than MP3, especially below 192 kbps. Both are lossy, so neither restores the original AIFF audio exactly.
Will an M4A play everywhere?
It plays cleanly across Apple devices and most modern hardware and apps. Very old cars or basic players sometimes prefer MP3, so use MP3 if you need the widest reach.
How much quality do I lose?
Some, since AAC is lossy. At 256 or 320 kbps the loss is inaudible to most listeners, while the file shrinks far below the AIFF size.
Does my AIFF get uploaded?
No. Everything runs in your browser with FFmpeg in WebAssembly. The file never leaves your device, and we never see, store, or train on it.
Who makes this?
We're the small team behind Xport Studio, a private, fully offline app for AI vocals, stems, and mastering. These free tools are side experiments we wanted to share. No upsell, but if you're curious about the bigger thing, take a look.