OpenAnyFile
Opening a WMF file usually means tracking down special software. It does not have to. Here is what the format really is, and a browser-based way to read one right now.
Windows Metafile is an image format developed by Microsoft, first appearing in 1990. It is normally produced by Office clip art, legacy desktop publishing.
The 16-bit predecessor of EMF. Its records could once carry an executable callback, the design flaw behind the 2005 WMF vulnerability, so Windows now refuses that record type outright.
| Full name | Windows Metafile |
|---|---|
| File category | Images |
| MIME type | image/wmf |
| Magic bytes (file signature) | D7 CD C6 9A or 01 00 09 00 |
| Developer | Microsoft |
| Introduced | 1990 |
| Usually created by | Office clip art, legacy desktop publishing |
| OpenAnyFile engine | progressive image decoder |
| Opens without upload | Yes — parsed locally in your browser |
OpenAnyFile routes .wmf to its progressive image decoder, which renders the picture drawn natively if your browser ships a decoder for this codec, and a full byte-level inspection with the detected signature if it does not.
Viewing, inspecting and verifying. You get the picture drawn natively if your browser ships a decoder for this codec, and a full byte-level inspection with the detected signature if it does not. File details, exact byte size and the detected signature are always shown.
Guaranteed rendering. Whether the picture draws depends on whether your browser ships a decoder for this codec; when it does not, you still get the full byte-level inspection instead of an error.
Most online viewers work by sending your file to their server, processing it there, and leaving a copy behind on infrastructure you do not control. OpenAnyFile does not. Your .wmf file is read through the browser's local File API and decoded by JavaScript and WebAssembly running on your own machine. There is no upload step and no server-side copy — open your browser's network tab while you do it and watch: the file never appears.
Yes. OpenAnyFile's progressive image decoder runs in your browser, so you can read a WMF file with nothing installed. You get the picture drawn natively if your browser ships a decoder for this codec, and a full byte-level inspection with the detected signature if it does not. For full editing you still need the original application — this is a viewer, not an editor.
Look at the first bytes rather than the extension. A genuine WMF begins with D7 CD C6 9A or 01 00 09 00. Opening the file in OpenAnyFile shows that signature in the file-details panel, so a file renamed to .wmf by mistake is easy to spot.
With OpenAnyFile, yes, because nothing is uploaded. The file is read locally through your browser's File API and never leaves your device, so there is no server copy to leak, log or retain. That matters most for the kind of file people are least willing to hand to a random converter site.
Windows Metafile — an image/wmf format created by Microsoft since 1990. The 16-bit predecessor of EMF. Its records could once carry an executable callback, the design flaw behind the 2005 WMF vulnerability, so Windows now refuses that record type outright.
Yes — the same engine also opens .emf, .exr, .hdr, so you can compare related files without switching tools.
These open with the same engine, so if you have one of these sitting next to your .wmf file, it will open too: