M4A to AAC
Drop an M4A file and get AAC, for the app, device or editor that needs it.
Your file stays on your device. Nothing is uploaded.
M4A to AAC in three steps
Drop your M4A
Up to 500 MB.
Convert
It's saved as a raw AAC file at the bitrate you choose (128, 192 or 320 kbps).
Download the AAC
Ready to use.
M4A and AAC, explained
M4A is AAC audio in an MP4-style file, Apple's usual audio format (Voice Memos, GarageBand, iTunes). It sounds a little better than MP3 at the same size.
AAC is the audio codec inside M4A and MP4 files, here as a raw .aac file. It sounds good at small sizes, but some apps only open it wrapped as M4A.
Both are compressed formats, so converting re-encodes the sound once. At a good bitrate the difference is hard to hear.
Frequently
Asked Questions
Does converting M4A to AAC lose quality?
AAC is lossy, so a little. At 192 kbps or more it's hard to hear.
Will the AAC be bigger or smaller?
About the same, depending on the bitrate you pick.
How long does it take?
Seconds for most files: audio converts quickly, even in the browser.
Is my file uploaded?
No. It's processed in your browser, on your own device, and never leaves it.