MP3 to M4A Converter
Convert MP3 to M4A free, right in your browser.
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About the MP3 to M4A converter
The MP3 to M4A converter changes a MP3 file into M4A, right in your browser. Upload your MP3 file and download the M4A version — free, with no sign-up, no watermark, and nothing uploaded.
MP3 is the universal audio format — small files that play everywhere. M4A is AAC audio in an MP4 container, common on Apple devices. The conversion runs on an in-browser build of ffmpeg, so your file is processed entirely on your own device and never sent to a server.
Frequently asked questions
- Is the MP3 to M4A converter free?
- Yes — completely free, with no sign-up, no watermark and no limits.
- Is my file uploaded to a server?
- No. It runs an in-browser build of ffmpeg, so your file is processed entirely on your own device and never uploaded.
- Will converting to M4A lose quality?
- Converting re-encodes the file to M4A, which is lossy, but the settings are tuned to keep quality high for everyday use.
- Why convert MP3 to M4A?
- M4A is AAC audio in an MP4 container, common on Apple devices. Converting to M4A makes the file easier to use wherever M4A is expected.
- Why does the first run take a moment?
- The first time, it downloads a ~32 MB processing engine, which is cached afterwards so later conversions start instantly.