How to Convert AAC to MP3 on iPhone

Converting AAC to MP3 directly on iPhone is possible entirely in the browser — no desktop computer or app installation required. AudioUtils runs using WebAssembly in Safari and Chrome on iPhone, allowing you to convert audio files directly on the device.

When You Need AAC to MP3 on iPhone

AAC (M4A) plays natively on iPhone, so you wouldn't normally need to convert for personal listening. Common reasons to convert on-device: sharing audio with someone whose device or player only accepts MP3, uploading to a platform that requires MP3 specifically, attaching audio to an email where the recipient uses a Windows PC with legacy software, or submitting voice recordings to services that specify MP3 format.

Step-by-Step: Convert on iPhone with AudioUtils

Open Safari on your iPhone and navigate to audioutils.com. Tap the upload area or use "Browse" to access your Files app. Locate your AAC or M4A file — it may be in iCloud Drive, the Downloads folder, or another app's storage. Tap to select the file. It loads into the browser. Select MP3 as the output format. Choose your bitrate — 128 kbps for voice and casual listening, 192 kbps for music. Tap convert. When processing completes, tap the download button. The MP3 file saves to your iPhone Downloads folder via Safari.

Finding AAC Files on iPhone

Voice Memos: tap the share icon on any memo, then Save to Files. The file saves as an M4A. GarageBand exports: Share > Song to Files saves as M4A. Music purchased from iTunes: these files are DRM-protected M4A and cannot be converted. Only DRM-free M4A files can be converted.

After Conversion

The MP3 file in your Downloads folder can be shared via AirDrop, email, Messages, or any Files-compatible app. To play it, tap the file in the Files app or import to a music player app. The MP3 format works on any device or player your recipient might use.