Add your WMF file
Drop one or more .wmf files onto the converter above, or browse for them. They load into browser memory only — nothing is uploaded, so there is no size-based pricing and no server queue.
WMF to ICO
Converting a .wmf drawing to .ico interprets the original drawing commands and outputs a portable image. Free, private, and validated — the file never leaves your browser.
Private for supported formats — processed in your browser
Runs on your deviceConvert supported files
Drop WMF files here
Batch files can each use a different output. Nothing uploads for local conversions.
Working inputs include camera RAW, browser-local audio/video, PDF, CBZ/CBR comics, office documents, ebooks, markup, 3D models, structured text, images, and archives.About converting Windows Metafile to Windows icon
Converting a .wmf drawing to .ico interprets the original drawing commands and outputs a portable image. Windows Metafile, seen as .wmf, is the original 16-bit vector format of Microsoft Windows — a replayable log of GDI drawing commands dating back to the era of Windows 3.0. Enormous amounts of 1990s clip art, including the classic Office galleries, shipped in this format.
An .ico file is a Windows icon container that bundles the same artwork at several sizes and color depths so the OS can pick the best match for any context. On the web it survives as the classic favicon format, with favicon.ico still the fallback path every browser requests. For this route the practical draw is multiple resolutions in a single file, chosen automatically and understood by every browser and every version of Windows — balanced against hard 256x256 ceiling makes it useless for general imagery, which is worth knowing before you commit a large batch.
Why convert WMF to ICO?
The practical trigger for this conversion is usually a mismatch: with .wmf, the 16-bit coordinate space rules out precise or large drawings. Switching to .ico buys you multiple resolutions in a single file, chosen automatically, which is why it is the better fit for website favicons served from the /favicon.ico fallback path. Because the conversion runs locally, trying it costs nothing but a few seconds of compute on your own machine.
WMF vs ICO at a glance
| Aspect | Windows Metafile (.wmf) | Windows icon (.ico) |
|---|---|---|
| Format type | Vector — resolution-independent geometry instead of pixels | Lossless — every pixel or sample is preserved exactly |
| How it stores data | 16-bit records encode GDI calls, capping coordinates at signed 16-bit values and limiting drawing precision | a directory header indexes multiple images, each with its own dimensions and bit depth |
| Strongest at | opening legacy clip-art libraries from the 1990s | website favicons served from the /favicon.ico fallback path |
| Weak spot | the 16-bit coordinate space rules out precise or large drawings | hard 256x256 ceiling makes it useless for general imagery |
Pick ICO as the output
Select .ico in the output menu next to each file. The menu only offers targets this engine can genuinely produce, so if ICO is selectable, the route is real and validated.
Convert on your device
Press Convert. The drawing records are interpreted locally and rendered to a validated image without any cloud converter.
Verify and download
Each result is signature-checked before the download unlocks, so a failed encode can never masquerade as a valid ICO file. Outputs keep the original filename with the .ico extension.
WMF to ICO questions, answered
Will converting WMF to ICO lose quality?
The conversion is exact at the resolution you rasterize to — vectors have no pixels until they are drawn. Pick dimensions that match the largest size you will display, because unlike .wmf, a .ico raster cannot be enlarged cleanly afterwards.
Is it private to convert WMF files here?
Yes — the .wmf file is processed inside your browser tab and never uploaded. The drawing records are interpreted locally and rendered to a validated image without any cloud converter. Close the tab and the file is gone from memory.
Where will the ICO file work?
All browsers request and render .ico favicons, and Windows depends on the format throughout its shell. macOS and Linux open it via common image libraries but use their own native icon formats (.icns, themed PNGs), so .ico matters chiefly for Windows software and website roots.
Will the ICO file be bigger or smaller than my WMF?
It depends on the content: a directory header indexes multiple images, each with its own dimensions and bit depth. Convert one representative file first and compare before batch-processing a large set.