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DOCM at a glance
DOCM
DOCM arrived in the post-binary Office era as Microsoft split macro-enabled and macro-free documents into distinct extensions, making trust and security policy easier to reason about.
MNG at a glance
MNG
MNG emerged from PNG-adjacent development discussions that wanted something more capable than static PNG, but its complexity limited broad consumer adoption.
Format comparison
| Feature | DOCM | MNG |
|---|---|---|
| File type | Document | Image |
| Extensions |
|
|
| MIME type |
|
|
| Created year | 2007 | 2001 |
| Inventor | Microsoft | PNG / MNG developer community |
| Status | active | legacy |
| Primary use cases |
|
|
| Vector scaling | Not supported | Not supported |
When to use each format
When to use DOCM
- Your source file is already in DOCM.
- Preserve source expectations before exporting to MNG.
- DOCM is commonly used in document workflows.
When to use MNG
- Your target workflow expects MNG.
- Improve delivery compatibility with MNG.
- MNG is commonly used in image workflows.
FAQs
Why convert DOCM to MNG?
Convert to MNG when preserving historical animated PNG-family assets or interfacing with a niche workflow that still expects it.
In most modern contexts, APNG, WebP, or video are more practical targets.
What changes when converting DOCM to MNG?
This conversion changes how the format behaves in downstream tools and delivery environments.
What should I review after converting DOCM to MNG?
Validate output quality on representative files and confirm the target format behaves correctly in the destination workflow.