Convert MP3 to M4A
Convert MP3 to M4A on your device. Choose your file, convert, and check the result before sharing.
Drop the mp3 file
Drag your MP3 onto the page or click to browse. It is read locally, never sent anywhere.
Choose M4A and bitrate
Pick 128, 192, 256 or 320 kbps. 192 kbps is the default. Click Convert to start processing in this tab.
Save the m4a
The finished M4A downloads straight back to your device. Nothing touched a server on the way.
Why convert here, not there
No upload, ever
Audio files are personal. MP3 to M4A here happens inside one browser tab, end to end.
Local conversion
Conversion runs locally after you click Convert. The first audio or video conversion may need to download the converter engine.
No account, no daily cap
No account or daily conversion quota. The per-file cap is 2 GB, and available device memory can impose a lower practical limit.
The two formats, briefly
| MP3 | MP3 is a lossy audio format. This converter encodes it at the selected bitrate rather than copying the original audio stream. | |
|---|---|---|
| M4A | M4A is an audio container. This converter writes AAC audio inside M4A, not Apple Lossless. | |
When you need this
- Use M4A when your receiving app or player does not accept MP3. This page re-encodes the audio, so keep the original and check the download in that app before replacing it.
MP3 vs M4A: what changes
| MP3 | M4A | |
|---|---|---|
| Kind | Audio | Audio |
| Compression | Lossy audio | AAC audio output here |
| Typical size | Depends on the file and encoding settings. | Measure the exported file; it may be larger. |
| Opens on | Check the source in your app and browser. | Check the downloaded file in the receiving app. |
| Best for | Keep the original as your source. | M4A workflows, subject to the limits below. |
Keep the original. Compare the exported file before sharing or replacing it.
Good to know
- The audio bitrate choices are 128, 192, 256 and 320 kbps, with 192 kbps as the default. Lower bitrates usually reduce size but can make loss more audible.
- First use downloads the audio/video engine (about 30 MB). The input cap is 2 GB, but available browser memory can run out below that.