Audio tool

Convert AAC Files to M4P on Your Device

Prepare a M4P version of AAC in your browser for legacy Apple library compatibility. Conversion stays on-device while a new M4P file is prepared.

Route AAC → 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

Encoding speed depends on the processor available to this tab during this AAC-to-M4P job.
High-resolution AAC footage increases conversion time and memory use.
Check picture, sound, and timing in M4P before removing the source.

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

AAC to M4P taking too long? Reduce other processor activity and leave the page open until completion.
M4P converted from AAC not opening? Test a compatible player and inspect the output streams.
Inspect the generated streams when an app recognizes M4P but refuses playback.

When does AAC to M4P conversion make sense?

It is useful when AAC media created for efficient distribution must enter a M4P system designed for older Apple libraries.

Where is the AAC source processed?

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

How can I approve M4P converted from AAC?

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

Quick use cases