Audio tool

Convert MP3 Files to M4P on Your Device

Convert MP3 to M4P in your browser for older Apple libraries. The source remains on your device throughout local processing.

Route MP3 → M4P

or drop here · up to 500 MB

Max 50 MB per file

Preview (optional)

When your browser supports it, your audio plays here. You can still convert your file if preview does not load.

Ready

Use upload name

The device processor performs decoding and encoding during the job during this MP3-to-M4P job.
Duration, resolution, and source bitrate affect how quickly MP3 is processed.
Review the beginning and end of M4P after the download finishes.

M4P serves legacy Apple library compatibility, whereas MP3 commonly serves phones, websites, podcasts, and universal playback.
For MP3-to-M4P delivery, plan for DRM expectations not recreated by conversion.
After leaving MP3, the receiving app must support the streams encoded inside M4P, not only its extension.

MP3 to M4P taking too long? Close other demanding apps, then test a short sample before the full file.
M4P converted from MP3 not opening? Test a compatible player and inspect the output streams.
Check whether the receiver supports this M4P variant: DRM expectations not recreated by conversion.

When does MP3 to M4P conversion make sense?

It is useful when MP3 media created for easy sharing must enter a M4P system designed for older Apple libraries.

Where is the MP3 source processed?

The browser prepares M4P from MP3 on this device instead of sending the source to a remote conversion server.

How can I approve M4P converted from MP3?

Test the M4P file in the receiving app and compare duration, channels and loudness with the MP3 source.

Quick use cases