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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.
BMP at a glance
BMP
Bitmap and device-independent bitmap structures became part of the Windows graphics story early in the platform's life, which is why BMP still appears in older desktop workflows and low-friction image interchange tasks.
Format comparison
| Feature | WMF | BMP |
|---|---|---|
| File type | Vector | Image |
| Extensions |
|
|
| MIME type |
|
|
| Created year | 1990 | 1990 |
| Inventor | Microsoft Corporation | Microsoft |
| Status | legacy | active |
| 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 BMP.
- WMF is commonly used in vector workflows.
When to use BMP
- Your target workflow expects BMP.
- Improve delivery compatibility with BMP.
- BMP is commonly used in image workflows.
FAQs
Why convert WMF to BMP?
Convert to BMP when a Windows-oriented tool, legacy application, or device explicitly expects simple bitmap input.
It is useful for compatibility, debugging image pipelines, and straightforward raster exchange where file size is not the priority.
What changes when converting WMF to BMP?
This conversion changes how the format behaves in downstream tools and delivery environments.
Moving to BMP removes vector scaling.
What should I review after converting WMF to BMP?
Validate output quality on representative files and confirm the target format behaves correctly in the destination workflow.