Convert BMP to PNM
Convert BMP files to PNM locally, completely free and with maximum privacy.
Drag and drop your files here
or click to browse local files (large files supported, limited only by browser RAM)
Upload FilesPlatform Statistics
How to convert BMP to PNM
- Drop your .bmp files above, or click Upload Files. You can add many files at once.
- PNM is already selected as the output. Open the settings (gear icon) to fine-tune the result.
- Click Convert All. ImageMagick runs inside your browser through WebAssembly; nothing is uploaded.
- Download your .pnm files as soon as each one finishes.
What to know about BMP to PNM conversion
- PNM is best for image processing pipelines and scientific code, and opens in GIMP, ImageMagick and Netpbm tools.
BMP vs PNM
| Feature | BMP (Bitmap Image File) | PNM (Netpbm Portable Anymap) |
|---|---|---|
| Compression | uncompressed | uncompressed |
| Transparency | No | No |
| Animation | No | No |
| Best for | pixel-exact images for legacy Windows software | image processing pipelines and scientific code |
| Opens in | Windows apps and most image editors | GIMP, ImageMagick and Netpbm tools |
BMP (Bitmap Image File): A classic uncompressed raster graphics format developed by Microsoft, preserving pixel-perfect quality.
PNM (Netpbm Portable Anymap): The generic Netpbm format family (PBM, PGM, PPM) for simple uncompressed bitmaps, graymaps and pixmaps.
Conversion options
- Resize by width, height or both (aspect ratio is preserved)
- Filters: grayscale, sepia, blur and sharpen
- Custom output file name
Frequently asked questions
Is it safe to convert BMP to PNM here?
Yes. Your files are processed entirely on your own device by WebAssembly code running in the browser. They are never uploaded, so nobody else can see them, and the converter keeps working even if your connection drops after the page loads.
Is there a file size limit?
There is no server-side limit. The only limit is the memory available to your browser, typically 1.5–4 GB on desktop computers.
Can I convert several BMP files at once?
Yes. Add as many files as you like; they are converted in parallel according to your device's CPU cores, and you can apply the same settings to all of them.
Related conversions
Need the opposite? Convert PNM to BMP.
Convert BMP to other formats
- BMP to JPG
- BMP to PNG
- BMP to PDF
- BMP to WEBP
- BMP to GIF
- BMP to SVG
- BMP to AVIF
- BMP to ICO
- BMP to TIFF
- BMP to JXL
- BMP to PSD
- BMP to TGA
Convert other formats to PNM
- JPG to PNM
- PNG to PNM
- PDF to PNM
- WEBP to PNM
- HEIC to PNM
- GIF to PNM
- SVG to PNM
- AVIF to PNM
- ICO to PNM
- TIFF to PNM
- JXL to PNM
- PSD to PNM
See every BMP converter and PNM converter, or browse the full converter directory.