Convert Apple audio recordings to universal formats. Every conversion runs locally on your Mac — your M4A files are never uploaded.
macOS 14 or later · Apple silicon · Free to try
M4A is the AAC-based audio format Apple uses for Voice Memos and Music. MP3 is the universally supported compressed audio format. Convert Apple audio recordings to universal formats.
PrivateRemix handles the M4A-to-MP3 conversion in a couple of clicks, with the result saved right next to your original file.
Unlike free online converters, PrivateRemix has no server. Your M4A files stay on your Mac — no upload, no cloud, no account.
Drag a M4A file into PrivateRemix, or pick one from your Mac.
Select MP3 from the formats PrivateRemix offers for your file.
The new MP3 appears next to the original. Nothing leaves your Mac.
The change is minimal. Both formats are compressed, and PrivateRemix converts at a high quality setting so there is no visible or audible drop for everyday use.
No. M4A (AAC) is Apple's format and slightly more efficient, but MP3 is more universally supported across devices and apps.
Effectively yes. MP3 is the most widely supported audio format in the world, which is why it's the go-to for sharing.
No. PrivateRemix runs entirely on your Mac using its own processor. Your M4A files never leave the device — there is no server to upload to, and it works fully offline.
Yes. Drop in a batch of M4A files and PrivateRemix converts them all locally, saving each new MP3 next to its original.
Free to try. macOS 14 or later, Apple silicon.