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WMF at a glance
WMF
The original WMF specification was published in the Windows 3.1 SDK documentation in 1992. Aldus Corporation independently added a 'placeable' header for device independence, which Microsoft later incorporated in Windows 2000. The format specification was republished in 2006 under the Microsoft Open Specification Promise.
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 | WMF | MNG |
|---|---|---|
| File type | Vector | Image |
| Extensions |
|
|
| MIME type |
|
|
| Created year | 1990 | 2001 |
| Inventor | Microsoft Corporation | PNG / MNG developer community |
| Status | legacy | legacy |
| Transparency | Not supported | Not supported |
| Animation | Not supported | Not supported |
| Primary use cases |
|
|
| Layer support | Not supported | Not supported |
| Vector scaling | Supported | Not supported |
When to use each format
When to use WMF
- Your source file is already in WMF.
- Preserve source expectations before exporting to MNG.
- WMF is commonly used in vector 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 WMF 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 WMF to MNG?
This conversion changes how the format behaves in downstream tools and delivery environments.
Moving to MNG removes vector scaling.
What should I review after converting WMF to MNG?
Validate output quality on representative files and confirm the target format behaves correctly in the destination workflow.