AAC to M4A
Drop an AAC file and get M4A, for the app, device or editor that needs it.
Your file stays on your device. Nothing is uploaded.
AAC to M4A in three steps
Drop your AAC
Up to 500 MB.
Convert
It's saved as AAC in an M4A file, at the bitrate you choose (128, 192 or 320 kbps).
Download the M4A
Ready to use.
AAC and M4A, explained
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.
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.
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 AAC to M4A lose quality?
M4A is lossy, so a little. At 192 kbps or more it's hard to hear.
Will the M4A 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.