Audio converters
Convert MP3 to M4A
Turn MP3 audio files into M4A. Pick a quality and optionally trim the start and end — conversion happens on your device.
Drop MP3 files here, or click to choose
Up to 3 files, 200.0 MB each · Files stay on your device
How it works
How to use the MP3 to M4A converter
- Drop your MP3 files into the box.
- Choose a quality and, if you like, a start and end time.
- Click Convert and download the M4A.
Formats
About the formats
- MP3 audio
- MP3 is the universal compressed audio format. It plays on every device.
- M4A (AAC) audio
- M4A is AAC audio in an MP4 container, used by iTunes, Apple Music and voice memos. It sounds better than MP3 at the same size.
FAQ
Frequently asked questions
Are my files uploaded?
No. The conversion runs inside your browser using WebAssembly, so your files never leave your device. Nothing is sent to our servers.
How big can my audio files be?
Up to 200 MB each on the free plan and 2 GB with Pro. Very large files depend on your device's memory.
Why is the first conversion slower?
The first time, your browser downloads the converter (a few MB). It's cached, so later conversions start right away. Where your browser supports it, video uses your device's hardware encoder.
Keep going
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