AIFF to MP3 — Logic Pro bounces, GarageBand exports, old Mac files.
Drop an .aiff or .aif file. We compress it to MP3 at the bitrate you pick, right here in your browser. Logic Pro and GarageBand bounce defaults, decades-old Mac audio, CD-ripped AIFFs — all handled. Batch a whole folder and get a zip back.
drop your AIFF here
or click to pick. .aif and .aiff both supported.
What this is good for
- Compressing a Logic Pro AIFF bounce for email or web — Logic Pro can export MP3 directly but most session templates bounce to AIFF first. Skip the extra Logic step.
- GarageBand share-to-disk file you need as MP3 — GarageBand's "Share → Export Song to Disk" defaults to AIFF for highest quality.
- Old Mac .aif files that won't play on Windows — decades-old recordings, family voicemails ripped off a hard drive, CD-ripped audio from iTunes 1.0.
- Sending an uncompressed master to someone on Spotify — they can't import AIFF; MP3 at 320 plays anywhere.
- Demo to a label or A&R — your AIFF master stays on disk, the MP3 goes in the email.
- Archive a folder of old AIFFs to MP3 — drop the whole folder, get a zip of MP3s back, originals untouched.
Why your Mac saved this as AIFF
AIFF (Audio Interchange File Format) is Apple's uncompressed lossless format — bit-for-bit identical to WAV, just with a different container. Logic Pro, GarageBand, and the classic iTunes "Import Settings" all default to AIFF on Mac because it preserves every sample. The trade-off: file sizes are huge (10 MB per minute, stereo, 44.1 kHz) and many non-Mac players don't open it. Converting to MP3 trades imperceptible fidelity for ~10× smaller files that play anywhere.
.aif vs .aiff — what's the difference?
None. They're the same format. The three-letter .aif extension dates to the 8.3 filename era and is still used by older Mac apps and Windows-friendly exports. The four-letter .aiff is the modern version. Same bytes inside, same decoder. This tool accepts both, plus .aifc (compressed AIFF, rare).
FAQ
How do I convert AIFF to MP3 on Mac without iTunes?
Drop the .aiff or .aif onto this page in any browser, pick a bitrate, and download the MP3. No iTunes, no Music app, no command line, no install.
How do I convert AIFF to MP3 on Windows?
Same as on Mac. Drop the file into this page in Chrome, Edge, or Firefox. Windows Media Player's AIFF support is spotty, so converting to MP3 once and storing the MP3 saves trouble later.
Why does Logic Pro bounce to AIFF instead of MP3?
AIFF is Apple's historical default for uncompressed audio. Logic Pro can export MP3 directly, but most session templates bounce to AIFF first. If you want MP3 straight out of Logic, set the bounce dialog's File Format to MP3 — but for an existing AIFF, just drop it here.
Is there any quality loss going from AIFF to MP3 at 320 kbps?
Mathematically yes — MP3 is lossy at any bitrate. Practically no — 320 kbps MP3 is indistinguishable from the AIFF source for almost all listeners on almost all gear. For archival, keep the AIFF.
Will old Mac .aif files from the 1990s still work?
Yes. AIFF hasn't changed materially in 30+ years. Whether it's a 22 kHz mono recording from a Performa or a 44.1 kHz stereo bounce from modern Logic, this tool reads it.
Can I batch convert a whole folder?
Yes. Select all the .aif/.aiff files in the file picker, or drag the folder onto the drop target. You'll get a zip of MP3s back with original filenames preserved.
Does my file get uploaded?
No. The conversion runs in your browser tab. You can disconnect from the internet and the tool still works.
How big can the AIFF be?
Around 500 MB per file on a typical laptop. A 1-hour stereo AIFF at 44.1 kHz is about 600 MB — that's near the ceiling. Cut it first with our Audio Cutter if it's bigger.