Convert AIFF audio to MP3 online for free.
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Checking files and selected output formats.
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MP3 is the universal lossy audio format — every music player, car stereo, phone, and audio-editing tool from 1998 forward accepts it. Convert to MP3 when maximum compatibility matters more than the last 5% of audio fidelity. 320 kbps MP3 is transparent for most listeners; 128 kbps is podcast quality. For streaming platforms, AAC or Opus produces better quality per bit but MP3 remains the compatibility default.
Technical comparison of the two formats — useful for deciding which to use, or for confirming what changes during conversion.
| Property | AIFF | MP3 |
|---|---|---|
| Full name | Audio Interchange File Format | MPEG-1 Audio Layer III |
| Year introduced | 1988 | 1993 |
| Developer / standard body | Apple | Fraunhofer / MPEG |
| MIME type | audio/aiff | audio/mpeg |
| File extension | .aiff / .aif | .mp3 |
| Compression | Uncompressed PCM (typically) | Lossy (MDCT) |
| Color / data depth | N/A | N/A (audio) |
| Max dimensions / size | 4 GB file size limit | Up to 320 kbps bitrate |
| Transparency | No | No |
| Animation | No | No |
| Standard / specification | Apple AIFF | ISO/IEC 11172-3 |
| Best for | Apple-ecosystem professional audio, Final Cut Pro, Logic Pro | Universal audio compatibility — playable on every device |
Quick answers about compatibility, quality, metadata handling, and the most common reasons to convert AIFF files to MP3.
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