Free Online AIFF to MP3 Converter

Shrink a studio AIFF into an MP3 small enough to send or stream.

Drop AIFF files here

or click anywhere in this box to choose files

Up to 50 MB per file. Sign up free to convert files up to 100 MB.

Selected files

File name	Size	Convert to

Convert all to:

Conversion complete

File name	File size	Download

Convert More Files Download All (ZIP)

AIFF to MP3: the first lossy step

AIFF is uncompressed, so until now the file has lost nothing. Encoding to MP3 applies a psychoacoustic model that discards the frequency content it predicts you cannot hear behind louder sounds, and that decision is permanent. A stereo 44.1 kHz AIFF drops roughly tenfold in size at 320 kbps.

Convert for playback, sharing or anything with a storage limit. Keep the AIFF if the audio will be edited or re-encoded later: each further MP3 pass compounds the loss from this one.

AIFF vs MP3: Side-by-side

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

Frequently asked questions

How do I convert AIFF to MP3?

Upload the AIFF file and choose an output format. The audio is re-encoded to MP3 and the track metadata is kept. No account is required, and whole albums or playlists can be uploaded together.

How to convert AIFF to MP3 without losing sound quality

MP3 is the near-universal lossy audio format. Converting to a lossless target (WAV, FLAC, AIFF) preserves every detail of the original. Converting between lossy formats involves a small, usually inaudible re-encoding step. For the best result, always start from the highest-quality source file you have.

Can I convert multiple AIFF files to MP3 at once?

Yes. Upload a whole album or playlist of AIFF files and they are all converted to MP3. Metadata (title, artist, album, cover art) carries over for each track, so your library stays organised after conversion. Batch uploads need a paid plan, Pro takes 20 files at a time and Business 100, while the free plan converts one file at a time.

Why convert AIFF to MP3 instead of keeping AIFF?

AIFF is Apple's uncompressed audio format used for professional audio on Mac. MP3 is better for music and podcasts on any device. Convert when the destination device, app, or platform handles MP3 more reliably than AIFF.

Does AIFF to MP3 conversion keep track info like artist and album?

Yes. ID3 metadata such as title, artist, album, and cover art carries over automatically wherever the MP3 format supports it, so your library stays organised after conversion.

What is AIFF?

AIFF is Apple's uncompressed audio format, typically used for professional audio on Mac. Converting it to MP3 produces a file that opens on systems without AIFF support.