Convert BMP to ICO
Convert BMP files to ICO 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 ICO
- Drop your .bmp files above, or click Upload Files. You can add many files at once.
- ICO 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 .ico files as soon as each one finishes.
What to know about BMP to ICO conversion
- Images larger than 256×256 pixels are scaled down automatically, the maximum size of a Windows icon.
- ICO is best for website favicons and Windows icons, and opens in browsers, Windows and icon editors.
BMP vs ICO
| Feature | BMP (Bitmap Image File) | ICO (Windows Icon) |
|---|---|---|
| Compression | uncompressed | lossless |
| Transparency | No | Yes |
| Animation | No | No |
| Best for | pixel-exact images for legacy Windows software | website favicons and Windows icons |
| Opens in | Windows apps and most image editors | browsers, Windows and icon editors |
BMP (Bitmap Image File): A classic uncompressed raster graphics format developed by Microsoft, preserving pixel-perfect quality.
ICO (Windows Icon): An image file format for computer icons, widely used as website favicons.
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 ICO 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 ICO 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 TIFF
- BMP to JXL
- BMP to PSD
- BMP to TGA
- BMP to DDS
Convert other formats to ICO
- JPG to ICO
- PNG to ICO
- PDF to ICO
- WEBP to ICO
- HEIC to ICO
- GIF to ICO
- SVG to ICO
- AVIF to ICO
- TIFF to ICO
- JXL to ICO
- PSD to ICO
- CR2 to ICO
See every BMP converter and ICO converter, or browse the full converter directory.