CONVERT
WMF → BMP
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Fast, secure WMF to BMP conversion. No registration required.
WMF is a raster image format with its own balance of compression, colour depth, and software support. That is why users land on this page looking for a BMP copy. Converting WMF to BMP swaps one image container for another without leaving the image family. The choice usually comes down to compatibility with the tool or platform that will consume the file next — some editors handle BMP natively while WMF still requires a plugin or extra step. KaijuConverter re-encodes in the browser session with ImageMagick, preserving resolution and colour profile, and leaves the source WMF untouched. Keep in mind WMF is a raster image format with its own balance of compression, colour depth, and software support. And remember that BMP is the uncompressed Windows bitmap format — bulky but pixel-perfect.
Windows Metafile
Source formatWMF (Windows Metafile) is a legacy Windows vector graphics format.
BMP Image
Target formatBMP is an uncompressed raster image format native to Windows. Files are large but preserve exact pixel data with no compression artifacts. Rarely used on the web due to file size.
Why convert WMF to BMP
Both WMF and BMP describe a grid of pixels — the difference lies in how that grid is compressed, whether transparency is supported, and which software opens it natively. Moving from WMF to BMP is worth it when the BMP ecosystem is broader for your use case, or when BMP compresses photographs more efficiently than WMF.
HOW TO CONVERT
WMF → BMP
Drop the WMF file
Drag and drop or click to upload your WMF. The image is transferred securely over HTTPS and queued for conversion.
Re-encode with ImageMagick
ImageMagick decodes every pixel of the WMF and writes a matching BMP with sensible default quality settings.
Download the BMP
The converted BMP is ready to download as a single file; both files delete automatically within two hours.
Common Use Cases
Share across platforms
Send BMP files to anyone without worrying about whether they have the right software for WMF.
Embed in documents
Drop BMP output into Word, Google Docs, PowerPoint, Notion or a website without conversion warnings.
Optimize size
BMP often produces smaller files than WMF for web, email and storage.
Archive & future-proof
Store in a widely-supported format that will still open on future operating systems without legacy plugins.
WMF vs BMP — Strengths and limitations
What each format does best, and where it falls short.
WMF Strengths
- Native Windows vector format.
- Efficient for line-art and diagrammatic images.
- Preserved in Office clipboard workflows.
Limitations
- Windows-only — poor Mac and Linux support.
- 2005 security vulnerability eroded trust.
- 16-bit coordinates in original WMF limit canvas size.
BMP Strengths
- Dead-simple format — trivially easy to read and write.
- Lossless and uncompressed — perfect bit-exact pixel storage.
- Universally supported in Windows applications since 1985.
- Supports 1, 4, 8, 16, 24, and 32-bit color depths.
Limitations
- Enormous file sizes — no meaningful compression in typical use.
- Not a web format — browsers support it but nobody serves BMPs over HTTP.
- No metadata support (no EXIF, no ICC profile in practice).
WMF vs BMP — Technical specifications
Side-by-side comparison of the technical details.
WMF
- MIME type
- image/wmf
- Extension
- .wmf
- Container
- Sequence of GDI drawing records
- Successors
- .emf (1993), .emf+ / .emfx (2000)
- Related spec
- [MS-WMF] (Microsoft Open Specifications)
BMP
- MIME type
- image/bmp
- Extensions
- .bmp, .dib
- Compression
- None (typical); RLE 4/8 bit (rare)
- Color depths
- 1, 4, 8, 16, 24, 32 bits per pixel
- Byte order
- Little-endian
| Specification | WMF | BMP |
|---|---|---|
| MIME type | image/wmf | image/bmp |
| Extension | .wmf | — |
| Container | Sequence of GDI drawing records | — |
| Successors | .emf (1993), .emf+ / .emfx (2000) | — |
| Related spec | [MS-WMF] (Microsoft Open Specifications) | — |
| Extensions | — | .bmp, .dib |
| Compression | — | None (typical); RLE 4/8 bit (rare) |
| Color depths | — | 1, 4, 8, 16, 24, 32 bits per pixel |
| Byte order | — | Little-endian |
WMF vs BMP — Typical file sizes
Approximate file sizes for common scenarios.
WMF
- Simple clipart 5-50 KB
- Detailed vector drawing 50-500 KB
BMP
- Small icon (32×32) 4 KB
- Screenshot (1920×1080) ~6 MB
- 4K image (3840×2160) ~25 MB
- Scanned A4 at 300 dpi ~25 MB
Quality & Compatibility
If BMP is a lossless format (PNG, TIFF, BMP) the output keeps every pixel of the decoded WMF exactly. If BMP is a lossy codec (JPEG, WebP, HEIC), the encoder re-compresses the image at the quality level you select — default 85 is transparent for photographs, quality 92+ for illustrations with hard edges.
Tips for Best Results
- Keep the original WMF alongside the BMP output — re-encoding already-lossy images accumulates detail loss on each round.
- If the BMP will be uploaded to a CMS, check whether the platform has a max dimension and downscale once on export rather than letting the CMS resize automatically.
- For thumbnails and avatars, export the BMP at exactly the display size; browsers will otherwise resample and the image may look soft.
Frequently Asked Questions
It depends on the codecs involved. If both WMF and BMP are lossy, the pixels are re-encoded and a small amount of detail is discarded — invisible at default quality settings on photographs. If BMP is lossless (PNG, TIFF, BMP) the output keeps every pixel of the decoded WMF exactly, but cannot recover detail that WMF had already compressed away.
Often yes, especially when BMP is lossless. WMF tuned for efficient web delivery will usually produce smaller files than BMP's default settings. If file size matters, drop the quality in Advanced or pick a more compressed target format instead.
KaijuConverter uploads over HTTPS, processes the image in an isolated container and deletes both the source and the output within two hours. No account is required, file contents are never logged, and we do not use uploads to train any model. For confidential material, the paid plan includes a data-processing agreement.
Related comparisons
See these formats side by side to understand which fits your use case best.
Related Guides
BMP Bitmap Format: The Complete Technical Guide
Everything about the BMP format: DIB header variants, pixel storage, color depths (1 to 32-bit), RLE compression, alpha channels, and BMP vs PNG vs TIFF.
Read guideBMP Format: Windows Bitmap Images Explained — Headers, Compression & Use Cases
Learn what BMP files are, how the Windows Device Independent Bitmap format works, supported colour depths, compression options, and when to use BMP vs PNG.
Read guideBMP Bitmap Format: Complete Technical Guide to Windows Bitmap Images
Learn BMP (Windows Bitmap): BITMAPINFOHEADER structure, pixel encoding, color palettes, RLE compression, and raster fundamentals for legacy graphics.
Read guideSecure & Private Conversion
Your files are encrypted during transfer, processed in isolated containers, and automatically deleted within 60 minutes. We never read, share, or store your data.