MP3 to M4A
Convert MP3 files to M4A for Apple Music, iTunes, and iPhones. Free, with no upload.
Drop files to convert
See their format, then choose an output.
MP3, M4A, WAV, FLAC, and other audio, or a video with sound. You can also drag in a whole folder.
How to convert MP3 to M4A
Open an MP3, or many at once, and save each one as an M4A with AAC sound, the format Apple Music, iTunes, and iPhones use. The MP3 to M4A converter runs in your browser, so your music stays on your device.
Step 1
Choose your MP3 filesPick one or many, or drop them into the converter above.Step 2
Keep M4AM4A is selected; choose another audio format if you need one.Step 3
Download the M4ASave each file when it's converted.
What to expect
- Supported inputs
- MP3 files and any other audio or video file.
- What happens
- The sound is re-encoded as AAC in an M4A file. M4A is selected first; you can choose another audio format.
- Limits
- Firefox has no AAC encoder, so there the M4A holds MP3 sound; use Chrome, Edge, or Safari for AAC.
Private by design
Your video stays on your device
Mastershot processes your file locally in this browser. It does not need to be uploaded to a server, and you do not need an account to use the tool.
- No upload
- No signup
- No watermark
Questions
No. It's encoded again, so detail the MP3 left out doesn't come back. Convert when an app needs M4A.
Use MP3 to M4R, which saves the same AAC sound with the ending iPhones need for ringtones.