Open M4A Files Online
M4A is an MP4 container with audio only, usually AAC. iPhone voice memos and iTunes purchases use it.
MPEG-4 Audio · .m4a
What you see in the M4A viewer
- Waveform and spectrogram
- AAC details and tags
- Loudness and peak levels
- Playback with loop
Other ways to open M4A files
Windows
Media Player or VLC.
macOS
Music or QuickTime Player.
Phone & tablet
Plays everywhere on iOS; Android in most players.
Frequently asked questions
Is my M4A file uploaded?
No. The file is read by your browser and shown on your own device. Nothing is sent to a server, and it is gone when you close the tab.
How do I open an M4A file without installing software?
Drop the .m4a file on this page. It opens straight away in the Audio Waveform & Spectrogram, on Windows, macOS, Linux, Android and iPhone alike.
What if my M4A file doesn't open?
The viewer checks the file's content, not just its name. If it is damaged or not really an M4A file, you'll see an error or can switch to the hex view to look at the raw bytes.
Can I convert M4A to another format?
Yes. The free file converter turns M4A files into other formats in your browser as well, without uploading them.