How to Convert AIFF to MP3 — Step by Step
AIFF files are studio quality but impractical for sharing. A three-minute AIFF takes 30 MB. Convert to MP3 and share it at 3-5 MB. Here is how to do it while keeping the best possible quality.
What You Need
An AIFF file — common in Mac-based music production, Logic Pro exports, and sample libraries. A web browser. AIFF is uncompressed, so you are converting from a perfect source. This gives the MP3 encoder the best possible input. AudioUtils runs the conversion in your browser with no upload. Ideal for producers who need to send a quick preview to a client or collaborator.
Step-by-Step Conversion
Open the AIFF to MP3 converter on AudioUtils. Drop your AIFF file on the page. Choose a bitrate: 320 kbps for the highest quality MP3, 192 kbps for a balanced file, 128 kbps for quick previews. Click Convert. The uncompressed AIFF audio is encoded as MP3 using a high-quality encoder. Download the result. The file size drops dramatically — 90% reduction is typical.
What to Expect: File Sizes and Quality
A 30 MB AIFF becomes roughly 3 MB at 128 kbps, 5 MB at 192 kbps, or 7 MB at 320 kbps. Converting from uncompressed AIFF gives you the best possible MP3. At 320 kbps, most listeners cannot tell the difference from the original. At 192 kbps, the compression is transparent for casual listening. Keep the original AIFF for future use — you might need a different format or bitrate later.
Common Issues and Fixes
AIFF-C files: Compressed AIFF variants exist but are rare. They should still convert fine. 24-bit AIFF: MP3 does not support 24-bit. The encoder dithers down to 16-bit during conversion. This is normal and rarely audible. High sample rate: AIFF files at 96 kHz or 192 kHz will be resampled to 44.1 or 48 kHz for MP3. Again, this is standard — MP3 does not support high sample rates.
Alternative Methods
Logic Pro: Bounce directly to MP3 from your session. FFmpeg: ffmpeg -i input.aiff -b:a 192k output.mp3. iTunes: Right-click and convert to MP3. Audacity: Import AIFF, Export as MP3. For sending rough mixes to clients, AudioUtils lets you convert without leaving your browser.