MP3 to AIFF Converter
Convert MP3 to AIFF free — no upload, no signup
To convert MP3 to AIFF, drop your MP3 audio files into the box below and click Convert. Fylo converts with ffmpeg running inside your browser, so nothing is uploaded and there's no signup or watermark. AIFF is Apple's uncompressed format for Mac audio apps.
Drop audio files here
or tap to browse · paste with Ctrl+V · add many at once
Your files never leave your device
AIFF is lossless — no bitrate to choose. Sample rate and channels are under Advanced.
Advanced
How to convert MP3 to AIFF
Add your MP3 files
Drag and drop MP3 files into the box or tap to choose them. The converter engine (about 31 MB) downloads once, the first time you convert.
Check the settings
AIFF is lossless, so there's no bitrate to pick. Change sample rate or switch to mono under Advanced if a device needs it.
Convert and download
Click Convert, then download each AIFF file or all of them as one ZIP.
Why convert MP3 to AIFF?
Logic Pro, GarageBand and some Mac samplers work most smoothly with AIFF.
What happens when you convert MP3 to AIFF?
Fylo decodes the MP3 to 16-bit PCM AIFF — about 10 MB per minute.
How does Fylo convert MP3 to AIFF?
Fylo decodes the MP3 audio in the MP3 with ffmpeg compiled to WebAssembly and encodes it with 16-bit big-endian PCM with no compression. Nothing is added back: the AIFF is an exact but larger copy of the decoded MP3 (≈ 32 MB for a 3-minute song versus ≈ 4.3 MB at 192 kbps). The original sample rate and channel layout are kept unless you change them under Advanced.
What's the difference between MP3 and AIFF?
MP3 (MPEG-1 Audio Layer III) was developed largely at Germany's Fraunhofer Institute and standardised in 1993. It removes sounds the ear is unlikely to notice — a technique called perceptual coding — so a 3-minute song takes about 4 MB at 192 kbps instead of about 32 MB as WAV. The last MP3 patents expired in 2017, so it's now free to use.
AIFF (Audio Interchange File Format) was created by Apple in 1988, based on Electronic Arts' IFF format. Like WAV it stores uncompressed PCM audio — just with big-endian byte order — so the two contain identical sound data at the same settings.
Learn more: MP3 format guide · AIFF format guide
| Property | MP3 | AIFF |
|---|---|---|
| Compression | Lossy | None (PCM) |
| Typical bitrate | 128–320 kbps | 1,411 kbps (CD quality) |
| 3-minute song | ≈ 4.3 MB at 192 kbps | ≈ 32 MB |
| Tags and cover art | Yes (ID3) | Yes (ID3 chunk) |
| Compatibility | Universal | macOS, iTunes, DAWs; less common on Windows |
| Best for | Music and podcasts on any device | Mac audio editing and music production |
| Introduced | 1993 | 1988 |
Frequently asked questions
Does converting MP3 to AIFF improve quality?
No. MP3 is lossy, so detail removed during its compression can't be restored. The AIFF is a lossless copy of what the MP3 sounds like — bigger, but not better.
AIFF or WAV?
They hold identical audio. Pick AIFF for Mac apps and WAV for Windows.
Is my MP3 file uploaded to a server?
No. Fylo runs ffmpeg, the same engine used by professional video tools, compiled to WebAssembly inside your browser. Your MP3 file is read directly from your device and never sent anywhere.
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