Free Online AIFF to MP3 Converter

Convert AIFF audio to MP3 online for free.

Drop AIFF files here

or click anywhere in this box to choose files

Max file size 50MB. Sign up for more.

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

AIFF to MP3 FAQ

Quick answers about compatibility, quality, metadata handling, and the most common reasons to convert AIFF files to MP3.

How do I convert AIFF to MP3?

Upload your AIFF audio to iFormat and click Convert. The track is decoded and re-encoded to MP3 with metadata preserved. It's free, needs no account, and supports batch conversion of albums or playlists.

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 an entire album or playlist of AIFF files and iFormat batch-converts them all to MP3. Metadata (title, artist, album, cover art) carries over for each track, so your library stays organised after conversion.

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 makes the file easier to open, share, or upload where AIFF is not supported.

Audio Format Guides for AIFF to MP3 Converter

Read playback, quality, file-size, and format-compatibility guides related to AIFF to MP3 Converter.

A Musician's Guide to Sharing MIDI Compositions as Audio

MIDI files play differently on every device. Convert your compositions to audio so your audience hears the arrangement the way you designed it.

How to Convert M4B Audiobooks to MP3 (Listen on Any Device)

M4B audiobooks don't play on most non-Apple devices. Here is exactly how to convert them to MP3 that works everywhere.

Lossless Audio Explained: FLAC vs ALAC vs APE vs WAV

All four formats are lossless, but they differ wildly in compatibility, file size, and metadata support. Here is how to pick the right one.

APE and ALAC Files Won't Play? How to Open Lossless Audio Anywhere

APE and ALAC files won't play on most devices. Here is why, and how to convert them to formats that work everywhere.

Audio File Formats Explained — MP3, WAV, FLAC, AAC, OGG & More

A complete guide to audio file formats. Compare MP3, WAV, FLAC, AAC, OGG, and ALAC by quality, file size, and compatibility.

MP3 vs FLAC vs WAV vs M4A vs OGG — Audio Formats Compared

Three formats, three different philosophies. Here is when MP3, FLAC, and WAV each make sense and when they absolutely do not.