AIFF to MP3 converter

Convert AIFF to MP3 in your browser. A first-generation encode from an uncompressed master, so the result is as good as MP3 gets.

Runs on your deviceFree, unlimited

Drop files here

Accepts .aiff,.aif · Up to 20 files at a time · up to 1.4 GB each "Upload" and "download" here mean your browser reading a file from this device and writing one back to it. Nothing is sent to a server — open your browser's network panel and watch: no request carries your file.

Audio quality

FAQ

Is AIFF the same as WAV?

Effectively yes for audio purposes — both store uncompressed samples. AIFF came from Apple and WAV from Microsoft, and they differ in byte order and metadata handling rather than in sound.

How much quality is lost?

Only the first lossy pass, which is the best case. At 192 kbps it is inaudible on ordinary equipment; at 320 kbps most listeners cannot distinguish it from the AIFF at all.

How much smaller will the file be?

Roughly a tenth at the default bitrate. A 50 MB AIFF lands near 5 MB.

Should I keep the AIFF?

Yes, if it is a master or part of a project. The MP3 is a distribution copy; deleting the uncompressed original means every future conversion starts from damaged audio.

Would FLAC be a better target?

If you want to save space without any loss, yes — FLAC stores identical samples at roughly half the size. Choose MP3 when the file needs to play on anything.

Is it really free?

Yes — every conversion on this site, with no account, no watermark and no daily cap. The work happens on your own device, so there is no server bill for us to pass on to you.

Do I need to install anything?

No. It runs in any modern browser, on Windows, macOS, Linux, Android and iOS. There is nothing to download and nothing to sign up for, and once the page has loaded it keeps working with the network switched off.

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