ICO to BMP Converter
Convert ICO images to BMP format directly in your browser. No file upload, no account required - files never leave your device.
Private
Files never leave your device. Conversion runs entirely in your browser.
Batch
Add as many files as you need - they queue automatically. Add more at any time.
Free
No account, no limits, no watermarks. Always free.
How to convert ICO to BMP
- 1.Drop your ICO file onto the upload area or click to browse.
- 2.The converter processes your file locally - no upload needed.
- 3.Click Download to save your BMP file.
ICO vs BMP: format guide
ICO is a container format for small icons, typically holding multiple PNG or BMP images at different sizes. It is the standard format for website favicons. BMP is an uncompressed raster format from early Windows. Files are large because pixel data is stored with little or no compression, and it has no transparency support. In practice, converting ICO to BMP is the right move when you need legacy Windows software.
- BMP 不支持透明，透明区域会被压到纯白背景上。
- 该格式需要我们的扩展浏览器解码器，超大 ICO 文件可能多花几秒。一切仍在您的设备上完成。
| Feature | ICO | BMP |
|---|---|---|
| Format type | Icon container | Uncompressed raster image |
| Compression | Varies (PNG/BMP inside) | Uncompressed |
| Transparency | Yes | No |
| Animation | No | No |
| Best for | favicons | legacy Windows software |
Best Practices for ICO to BMP Conversion
- Preserve Aspect Ratio and Detail: Our in-browser conversion engine retains the original pixel dimensions and aspect ratio of your source ICO graphic without introducing unwanted scaling artifacts.
- Transparency Handling: If converting an image containing transparent pixels into a format that does not support transparency (such as JPEG), transparent backgrounds are cleanly filled with a solid neutral background.
- Web Performance Optimization: For web deployment, modern formats offer enhanced compression curves that drastically cut byte payload, helping websites score higher on Google PageSpeed Insights and mobile usability benchmarks.
ICO to BMP Frequently Asked Questions
- How do I convert ICO to BMP?
- Drop your ICO file onto the upload area or click to browse. The conversion starts automatically. When it finishes, click Download to save your BMP file.
- Is the ICO to BMP converter free?
- Yes - completely free, no account required, no file limits, and no watermarks added to your images.
- Are my ICO files uploaded to a server?
- No. All conversion happens locally in your browser. Your ICO files never leave your device.
- Can I convert multiple ICO files at once?
- Yes - drop multiple ICO files at once or add them one by one. Each file is converted automatically and can be downloaded individually or all at once as a ZIP.
- What is the difference between ICO and BMP?
- ICO and BMP are different image formats with different compression methods and feature support. Use the converter to switch between them based on your needs.
- Will converting ICO to BMP reduce my file size?
- File size changes depend on the underlying compression algorithms. Converting uncompressed or lossless formats (such as PNG, BMP, or TIFF) into high-efficiency formats (such as WebP, AVIF, or JPG) frequently achieves a 30% to 80% reduction in storage size while maintaining excellent visual fidelity. Conversely, converting to lossless formats preserves exact pixel values.
- Is this ICO to BMP converter secure for confidential images?
- Yes. All processing executes locally inside your web browser using HTML5 Canvas, OffscreenCanvas, and WebAssembly APIs. Your graphics and personal photos never travel over the network, are never stored on external databases, and are immediately cleared from browser memory when you close the tab.