Convert anything, at global scale.
200+ formats and automation APIs that feels instant.
CONVERT
From
To
Drop files or choose a source
Upload multiple files at once, mix formats, and fine-tune every conversion with format-aware settings.
Max 2GB per file · Drag & drop ready · Mixed file types welcome
AUDIO
MetaPost to M4P Converter — Free, Online, No Signup
Convert MetaPost files to M4P online with no signup required.
MetaPost at a glance
MetaPost
John Hobby developed MetaPost from MetaFont ideas, and the system later evolved into the MPlib era so TeX and LuaTeX workflows could keep high-quality vector graphics close to typeset documents.
M4P at a glance
M4P
M4P belongs to the iTunes-store period when downloadable music was widespread but still strongly shaped by platform-controlled authorization and protection systems.
Format comparison
| Feature | MetaPost | M4P |
|---|---|---|
| File type | Vector | Audio |
| Extensions |
|
|
| MIME type |
|
|
| Created year | 1994 | 2003 |
| Inventor | John Hobby | Apple Inc. |
| Status | active | legacy |
| Primary use cases |
|
|
When to use each format
When to use MetaPost
- Your source file is already in MetaPost.
- Preserve source expectations before exporting to M4P.
- MetaPost is commonly used in vector workflows.
When to use M4P
- Your target workflow expects M4P.
- Improve delivery compatibility with M4P.
- M4P is commonly used in audio workflows.
FAQs
Why convert MetaPost to M4P?
Legacy playback of DRM-protected iTunes Store purchases from before 2009.
Not applicable to new encoding or distribution workflows.
What changes when converting MetaPost to M4P?
This conversion changes how the format behaves in downstream tools and delivery environments.
What should I review after converting MetaPost to M4P?
Validate output quality on representative files and confirm the target format behaves correctly in the destination workflow.