Audio ToolsFree

AIFF to MP3

Convert AIFF lossless audio files to MP3 format for dramatically smaller file sizes. AIFF (Audio Interchange File Format) is Apple's uncompressed PCM audio — files are 10–30x larger than equivalent MP3. Convert for sharing, portable players, and web use. No signup.

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MP3, AAC, WAV, FLAC, OGG, WMA, AIFF, M4A

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Frequently Asked Questions

How much smaller is MP3 compared to AIFF?▼
AIFF stores uncompressed PCM audio — a 3-minute stereo song at 44.1 kHz/16-bit is about 30 MB as AIFF. At 320 kbps MP3, the same song is about 7 MB — roughly 4–8x smaller, with inaudible quality difference.
What is AIFF format used for?▼
AIFF is Apple's professional uncompressed audio format, used in Logic Pro, GarageBand, Pro Tools, and professional audio production on Mac. It preserves every sample exactly, making it ideal for editing and mixing.
Is audio quality affected at 320 kbps MP3?▼
At 320 kbps MP3, the quality difference from AIFF is inaudible for the vast majority of listeners and audio content. The only scenario where AIFF quality matters is in further audio processing where compression artifacts could accumulate.
What is the .aif file extension?▼
.aif and .aiff are the same format. Both are Apple's AIFF audio format and are handled identically by this converter.
Is the conversion done in the browser?▼
Yes. FFmpeg WebAssembly handles AIFF decoding and MP3 encoding locally. No file is uploaded.