Browser edition: files stay on your device. Up to 100 MB total and 10 minutes. First use downloads a 32 MB engine. Some formats depend on codec support. Public-link downloading is not ready on this free deployment.
Convert AIFF to MP3
Convert AIFF to MP3 online for free. Real conversion, batch support, no sign-up.
How to convert AIFF to MP3
- Add your fileDrop it on the page, choose it from your device, or paste it with Ctrl+V.
- ConvertAdjust settings if you like, then press the button. You'll see live progress.
- Browser processing uses original files on your device. Public-link downloading is unavailable.
What happens to your file
AIFF files are common for Logic Pro, GarageBand, professional audio on Mac, but not every app or device opens them. MP3 is ideal for music libraries, podcasts, car stereos, any device. Spool converts AIFF to MP3 with FFmpeg — real decoding and encoding, not a renamed file extension.
Lossless → lossy. AIFF keeps every sample; MP3 discards sounds that are hard to hear to save space. Choose 320 kbps for critical listening, 192 kbps for everyday use, or 128 kbps for voice.
Settings
- Audio bitrate — 320 kbps · best, 256 kbps, 192 kbps · standard, 128 kbps · small, 96 kbps, 64 kbps · voice
- Channels — Original, Mono
- Sample rate — Original, 48 kHz, 44.1 kHz, 22 kHz
AIFF vs MP3
| AIFF | MP3 | |
|---|---|---|
| Full name | Audio Interchange File Format | MPEG-1 Audio Layer III |
| Created by | Apple, 1988 | Fraunhofer IIS / MPEG, 1993 |
| Type | Lossless audio | Lossy audio |
| Typical contents | uncompressed PCM | MP3 (lossy) |
| Best for | Logic Pro, GarageBand, professional audio on Mac | music libraries, podcasts, car stereos, any device |
| Strength | Lossless, uncompressed | Universal compatibility |
| Weakness | Very large files | Lossy: some detail is discarded |
About AIFF
- Type
- Audio Interchange File Format
- Contains
- uncompressed PCM
- Use
- Logic Pro, GarageBand, professional audio on Mac
About MP3
- Type
- MPEG-1 Audio Layer III
- Contains
- MP3 (lossy)
- Use
- music libraries, podcasts, car stereos, any device
FAQ
What bitrate should I choose for MP3?
192 kbps is a good default for music. Choose 320 kbps for the best quality, 128 kbps for podcasts and voice, 64 kbps for small voice notes.
Can I convert several AIFF files at once?
Yes. Drop up to 10 files at a time — each one is converted in parallel and you can download them individually or all at once.
Is there a file size limit?
Convert and edit files on your device. The browser edition accepts up to 100 MB total, media up to 10 minutes and video up to 4K. Codec availability and device memory can limit individual jobs.
Is this AIFF to MP3 converter free and safe?
Yes. There are no pop-ups, redirects or fake download buttons, and no software to install. Files are transferred over HTTPS, processed in isolated job folders and deleted automatically.