Why convert AIFF to MP3?
AIFF is Apple's uncompressed WAV equivalent, common in Logic Pro sessions. Converting it to MP3 gets you the universal small-file format every device, app and car stereo plays, so it plays and shares everywhere without hassle.
This converter runs the same FFmpeg engine desktop tools use, compiled to WebAssembly and executed entirely in your browser. Your AIFFnever touches a server — which is why it's private, works on slow connections, and has no queue. You can also trim, fade, merge and batch-convert in the same step.
Frequently Asked Questions
How do I convert AIFF to MP3 for free?
Drop your AIFF file into the tool above (or click to browse), then hit Export. The output is already set to MP3. It converts instantly in your browser and downloads — no signup, no watermark.
Is my AIFF file uploaded to a server?
No. The conversion runs entirely in your browser using WebAssembly (FFmpeg). Your AIFF file never leaves your device, which is why it works offline and stays private.
Will converting AIFF to MP3 lose quality?
MP3 is a compressed format, so there's a small, usually inaudible quality trade for a much smaller file. Use the Advanced options above to pick a high bitrate (e.g. 320 kbps) if you want maximum fidelity.
Can I trim or fade the audio while converting AIFF to MP3?
Yes — drag the waveform handles to trim, add fade-in/out, adjust volume or bitrate, then export. You can also drop several AIFF files to batch-convert or merge them into one MP3 file.