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How do I convert AIFF to MP3?

AIFF stores uncompressed audio much like WAV, so the files are large and awkward to email, upload, or sync. Converting to MP3 shrinks them dramatically while keeping playback easy on any device.

Updated 2026-08-28

Your MP3 is ready Download MP3

Upload your AIFF file and choose MP3 as the output, then download it. AIFF is Apple's uncompressed, lossless format and gets very large, so the MP3 will be dramatically smaller, often around a tenth of the size, with only a slight, usually inaudible quality reduction at a good bitrate.

How it works

1

Upload your AIFF file

Select or drag in the uncompressed AIFF audio you want to compress.

2

Choose MP3 as the output

Set MP3 as the target so the converter compresses the large AIFF audio.

3

Download your MP3

Save the much smaller MP3, ready to share or sync anywhere.

Frequently asked questions

A lot. AIFF is uncompressed, so an MP3 is often roughly a tenth of the original size depending on bitrate, which makes storing and sharing far easier.
AIFF is lossless and MP3 is lossy, so some audio data is discarded during encoding. At a higher bitrate the loss is minimal and most listeners cannot hear it in normal playback.
They are very similar. Both store uncompressed, lossless PCM audio and produce large files. AIFF is Apple's version, WAV is the Microsoft equivalent, and both convert to MP3 the same way.
Yes, if you plan to edit or master the audio. Keep AIFF as your source for editing and use the MP3 as the small, shareable final copy.
No. The conversion runs online with no software to install and no signup, and your file is deleted after processing.

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