AAC to M4A Converter
Re-wrap raw AAC audio into the tag-friendly .m4a container Apple uses. Free, in your browser, no signup.
Drag & drop your AAC file here, or browse
Have a raw .aac stream you want as a proper .m4a file? This free converter re-wraps AAC audio into the MPEG-4 .m4a container — the tag-friendly format Apple uses — in seconds, no software or signup. Files up to 30MB are converted directly and nothing is stored after your download.
How to convert AAC to M4A
1. Upload your AAC file
Drag a file onto the box above, or click to browse. Raw .aac and existing .m4a files are both accepted.
2. Choose a bitrate
M4A is already selected as the output. Pick a bitrate for the AAC audio inside — 320 kbps for best quality.
3. Convert & download
Click Convert & Download. Your .m4a file downloads automatically, ready for the Apple Music app and iTunes.
Why .m4a instead of .aac?
Both hold AAC audio, but a raw .aac stream can't reliably carry metadata like title, artist, and album art. The .m4a container can — which is why Apple uses it for iTunes and Apple Music. Re-wrapping to .m4a gives you a tidy, taggable file. See AAC vs M4A.
Frequently Asked Questions
How do I convert AAC to M4A?
Upload your .aac file, keep M4A selected and pick a bitrate, then click Convert & Download. The .m4a file is created and downloaded automatically.
What's the difference between .aac and .m4a?
Both contain AAC audio. .m4a is an MPEG-4 container that also stores metadata and album art; a raw .aac stream cannot. The codec inside is the same.
Does converting AAC to M4A lose quality?
This tool re-encodes the AAC at your chosen bitrate, so pick 320 kbps to keep the result transparent for almost all listeners.
Is the AAC to M4A converter free?
Yes — it's completely free, with no account, no watermarks, and no limit on how many files you convert.