Convert BMP to ICO Online
Transform your Bitmap Image File (BMP) files into universally supported Windows Icon Format (ICO) images in seconds. Our converter runs 100% locally in your browser—your images are never uploaded to remote servers, ensuring complete privacy and blazing fast conversions.
BMP vs ICO: Format Comparison
| Feature | BMP | ICO |
|---|---|---|
| Compression Algorithm | Lossless (Pixel perfect) | Lossless (Pixel perfect) |
| Alpha Transparency | Not Supported (White background) | Supported (Transparent background) |
| Animation / Sequences | Static single frame only | Static single frame only |
| Browser Compatibility | 100% (Universal) | 100% (Universal favicon support across all browsers) |
| Ideal Application | Embedded microcontroller systems, legacy Windows applications, uncompressed pixel arrays | Website favicons, desktop shortcut icons, taskbar emblems |
How to Convert BMP to ICO (3 Easy Steps)
- Upload BMP: Select your BMP file by dragging and dropping it into the conversion box, or click Browse to choose from your device.
- Select ICO Output: Configure your output parameters. The tool is pre-set to convert to ICO. Adjust quality or dimension preferences if required.
- Instant Download: Click Convert and download your finished ICO instantly. Everything processes locally in your browser memory.
Technical Specifications
About BMP
Full Name: Bitmap Image File
MIME Type: image/bmp
Developer / Standard: Microsoft Corporation
Introduced with Windows 1.0 in 1985.
About ICO
Full Name: Windows Icon Format
MIME Type: image/x-icon
Developer / Standard: Microsoft Corporation
A container format that can store multiple icon resolutions (16x16, 32x32, 48x48) in one file.
Frequently Asked Questions
How do I convert BMP to ICO for free?
Simply drop your BMP file into the converter box above, ensure ICO is selected as the output format, and click Convert. Your converted ICO file is generated instantly right in your browser.
Will converting BMP to ICO reduce image quality?
No. ICO is a lossless format, so every pixel from your original BMP image is preserved with zero compression artifacts.
Does converting BMP to ICO preserve transparency?
Yes! ICO supports alpha transparency. If your source BMP image has a transparent background, it will be preserved.
Is my file safe when converting on convertfiles.app?
100% safe. Unlike traditional cloud converters, convertfiles.app processes everything directly on your device using WebAssembly and HTML5 Canvas. Your files never leave your computer or phone.