Convert Audio to M4A
Create AAC audio in an M4A container.
How to use Convert Audio to M4A
Create AAC audio in an M4A container.
Audio is re-encoded; quality and resulting file size depend on source audio and output codec.
- Open Convert Audio to M4A on Tools4U.
- Upload the supported audio file.
- Adjust any settings, select Process Audio, then wait.
- Preview and download your output within 12 minutes.
Frequently asked questions
Is Convert Audio to M4A free?
Yes. Signed-in verified users can process short audio, and Premium members do not see advertisements.
What are the upload limits?
Up to 24 MB per file, 48 MB combined, 180 seconds per track, and 10 jobs per hour. Some effects have shorter input limits.
Where is audio processed?
The audio is processed by an isolated private FFmpeg worker. Outputs are temporary, but you should still avoid uploading confidential material without permission.