About this tool
Voice Memos, iTunes purchases, and many recorder apps produce M4A files, which some car stereos, older players, and upload forms refuse. This converter turns them into universally compatible MP3s in seconds.
About the formats: M4A is AAC audio inside an MP4 container, Apple's default for Voice Memos, iTunes purchases, and many recording apps. Quality is excellent, but plenty of players and web forms only accept MP3. MP3 is the universal lossy audio format. Practically every device, car stereo, and app made in the last 25 years plays it, and at 192-320 kbps it is indistinguishable from the original for most listeners.
Everything happens inside your browser. Your file is never uploaded to a server: the conversion runs on your own device using WebAssembly, and the result is downloaded straight from memory. Close the tab and nothing is left behind.
How to use it
- Drop your M4A files into the box above, or click to browse. Nothing is uploaded.
- Adjust the options if you want; the defaults suit most files.
- Click Convert to MP3 and wait a moment.
- Download the results individually or all at once as a ZIP.
Frequently asked questions
Does M4A to MP3 reduce quality?
Slightly, because both are lossy and the audio is re-compressed. Use 192 kbps or higher and you will not hear it.
Can I convert protected iTunes M4P files?
No. DRM-protected files cannot be decoded.
Is this really free?
Yes. The site is supported by ads, and there are no limits on how many files you convert.
Are my files uploaded anywhere?
No. The converter runs entirely in your browser. Files stay on your device, which also makes it faster than upload-based converters for anything larger than a few megabytes.
Is there a file size limit?
The only limit is your device's memory. Images and audio of any normal size are fine; for video, files under about 500 MB work well on most laptops and phones.
Which browsers are supported?
Current versions of Chrome, Edge, Firefox, and Safari on desktop and mobile. Very old browsers without WebAssembly support will not work.