AIFF to Opus 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 Opus 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 Opus, 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 Opus.

A minute of AIFF is about 10 MB; the same minute as Opus is roughly 0.5. Across an album or a long recording that difference decides whether it fits on a phone. Keep the AIFF. It's the archival master; the Opus is the copy that travels. Re-encode from the master whenever you need another format or bitrate.

AIFF to Opus 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 Opus 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-Opus conversion on-device means there is no server to trust in the first place.

AIFF files come from Logic Pro and GarageBand bounces, old iTunes rips, and Mac sample libraries. AIFF is uncompressed like WAV, so a four-minute song is 40 MB+ and won't attach to an email — which is the whole reason this conversion exists. Opus is the destination because it plays essentially everywhere — Discord recordings and every ordinary phone, browser, and player. Expect roughly 20× smaller: AIFF runs about 10 MB per minute, Opus about 0.5. Because AIFF is uncompressed, encoding to Opus here is the clean, single-generation case — the encoder sees the whole original signal, so this Opus is as good as the format gets.