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
STRUCTURED DATA
WMF to Open Package Format Converter — Free, Online, No Signup
Convert WMF files to Open Package Format online with no signup required.
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.
Open Package Format at a glance
Open Package Format
OPF began in the Open eBook era, evolved through IDPF EPUB specifications such as OPF 2.0.1, and is now carried forward by the W3C EPUB package-document model.
Format comparison
| Feature | WMF | Open Package Format |
|---|---|---|
| File type | Vector | Other |
| Extensions |
|
|
| MIME type |
|
|
| Created year | 1990 | 1999 |
| Inventor | Microsoft Corporation | International Digital Publishing Forum (IDPF) |
| Status | legacy | active |
| Transparency | Not supported | Not supported |
| Animation | Not supported | Not supported |
| Primary use cases |
|
|
| Vector scaling | Supported | Not supported |
| Structured data | Not supported | Supported |
When to use each format
When to use WMF
- Your source file is already in WMF.
- Preserve source expectations before exporting to Open Package Format.
- WMF is commonly used in vector workflows.
When to use Open Package Format
- Your target workflow expects Open Package Format.
- Improve delivery compatibility with Open Package Format.
- Open Package Format is commonly used in other workflows.
FAQs
Why convert WMF to Open Package Format?
EPUB ebook package authoring, ebook metadata management, and ebook production pipelines that generate or process EPUB package documents.
What changes when converting WMF to Open Package Format?
This conversion changes how the format behaves in downstream tools and delivery environments.
Moving to Open Package Format removes vector scaling. Moving to Open Package Format adds structured data.
What should I review after converting WMF to Open Package Format?
Validate output quality on representative files and confirm the target format behaves correctly in the destination workflow.