AIFF to FLAC on iPhone

Safari on iOS 15.4 and newer runs the converter completely, on the phone itself. There is no App Store download — and no converter app quietly uploading your recordings to its own servers. AIFF files convert to FLAC here the same way — nothing to install.

If the file is in Voice Memos or Photos, tap the share icon and choose 'Save to Files' first — that makes it visible to Safari's file picker. The converted file lands in Files (Downloads by default), from where you can share it into Messages, Mail, or any app. Your AIFF comes out as FLAC, ready to use straight away.

The AIFF files people convert on an iPhone almost always originate from Logic Pro and GarageBand bounces, old iTunes rips, and Mac sample libraries, and AIFF is uncompressed like WAV, so a four-minute song is 40 MB+ and won't attach to an email — which is precisely why they're stuck on the phone until you convert them to FLAC.

Expect a similar file size; the reason to convert is playback and workflow, not disk. This conversion costs you nothing in quality — it's compression in the ZIP sense, not the MP3 sense.

AIFF to FLAC is a common iPhone snag specifically because AIFF is uncompressed like WAV, so a four-minute song is 40 MB+ and won't attach to an email, and FLAC is what your other apps and devices expect. Apple gives you no built-in way to convert audio at all, so the App Store is full of converter apps — many upload your recording to their own servers, show ads against it, and want a subscription. Doing it in Safari means the AIFF file is processed on the phone itself and stays there, which matters when it is a voice memo, an interview, or a recording of your own family.

Your AIFF file never leaves the handset. For iPhone that is the whole argument: Logic Pro and GarageBand bounces are usually personal, and the App Store alternative frequently ships them to a company's servers as the price of a free conversion. Processing the AIFF-to-FLAC conversion on-device means there is no server to trust in the first place.

Where does a AIFF file even come from? Usually Logic Pro and GarageBand bounces, old iTunes rips, and Mac sample libraries. The catch is that AIFF is uncompressed like WAV, so a four-minute song is 40 MB+ and won't attach to an email. FLAC is the destination when you need uncompressed, edit-ready audio that every DAW and editor accepts. Sizes are comparable: AIFF and FLAC both sit near 10–5 MB per stereo minute, so this conversion is about compatibility, not storage. Both AIFF and FLAC are lossless, so this specific conversion is bit-perfect: every sample survives and you can go back to AIFF later without any loss.