Convert ICO to PNM
Convert ICO 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)
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How to convert ICO to PNM
- Drop your .ico 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 ICO to PNM conversion
- PNM has no transparency, so transparent areas of the ICO are filled with white.
- PNM is best for image processing pipelines and scientific code, and opens in GIMP, ImageMagick and Netpbm tools.
ICO vs PNM
| Feature | ICO (Windows Icon) | PNM (Netpbm Portable Anymap) |
|---|---|---|
| Compression | lossless | uncompressed |
| Transparency | Yes | No |
| Animation | No | No |
| Best for | website favicons and Windows icons | image processing pipelines and scientific code |
| Opens in | browsers, Windows and icon editors | GIMP, ImageMagick and Netpbm tools |
ICO (Windows Icon): An image file format for computer icons, widely used as website favicons.
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 ICO 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 ICO 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 ICO.
Convert ICO to other formats
- ICO to JPG
- ICO to PNG
- ICO to PDF
- ICO to WEBP
- ICO to GIF
- ICO to SVG
- ICO to AVIF
- ICO to TIFF
- ICO to BMP
- ICO to JXL
- ICO to PSD
- ICO 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
- TIFF to PNM
- BMP to PNM
- JXL to PNM
- PSD to PNM
See every ICO converter and PNM converter, or browse the full converter directory.