justyourconvertMP3 to M4A Converter
Turn MP3s into M4A audio for Apple devices.
- 100% Free
- No Sign Up
- Nothing Uploaded
MP3 to M4A
Turn MP3 files into M4A (AAC) audio
Drag & drop an audio file
or click to browse. You can also paste.
MP3, or any audio, up to your device's memory.
192 kbps is near-transparent for most music.
Result-
Processed on your device. Nothing is uploaded.
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How to convert MP3 to M4A
Three steps, all in your browser.
- 1
Add your audio
Drop or choose an audio file.
- 2
Choose settings
Pick the format and quality.
- 3
Download
Save the converted file.
MP3 to M4A Converter: what to know
M4A is an MPEG-4 audio file holding AAC, the codec Apple uses throughout its devices and apps. AAC is a lossy codec that generally sounds better than MP3 at the same bitrate. M4A files can also carry tags and artwork, and iPhone ringtones are AAC files with an .m4r extension.
This tool decodes the MP3 in your browser and encodes it as AAC using the browser's built-in encoder through WebCodecs, then wraps it in an M4A file. AAC encoding support varies by browser and operating system; most current versions of Chrome, Edge and Safari provide it. If your browser lacks an AAC encoder, the tool tells you instead of failing silently.
Converting from MP3 to AAC is a lossy-to-lossy step, so it can't improve quality and adds a little loss of its own. Use a bitrate similar to or higher than the MP3's. The main reasons to convert are an app or device that prefers M4A, or making an iPhone ringtone. Your audio never leaves your device.
Popular uses
- Making iPhone ringtones
- Apps and workflows that expect M4A
- Adding audio to Apple projects and libraries
- Matching the format of an existing M4A collection
Tips for the best result
- Trim a ringtone to under 40 seconds before converting, then rename it to .m4r.
- Don't convert MP3s to M4A to save space; the gain is small and quality drops.
- If AAC encoding isn't available, try current Chrome, Edge or Safari.
Read how JustYourConvert works and our privacy details. Keep your original files and check a converted file before you replace anything.