BMP to ICO Converter

Convert BMP bitmap images to ICO icons with multiple sizes, transparency preservation, and quality control for web and desktop applications.

Drop your BMP image here

or click to browse files

Supports BMP files up to 10MB
Related Converters:
ICO to BMP PNG to ICO JPG to ICO Favicon Generator

How to Convert BMP to ICO

  1. Upload your BMP

    Drag and drop your BMP image or click to browse files.

  2. Select icon sizes

    Choose the sizes you need (16×16, 32×32, 48×48, etc.) or use quick presets.

  3. Configure options

    Adjust quality, color depth, and transparency settings as needed.

  4. Convert and download

    Click "Convert to ICO" and download your icon file ready for use.

Size Presets Guide

Favicon

16×16, 32×32, 48×48 – Essential sizes for website favicons displayed in browser tabs and bookmarks.

Desktop

16×16 through 256×256 – Complete set for Windows desktop icons, shortcuts, and Explorer views.

All Sizes

All available sizes including 512×512 for high-DPI displays and modern applications.

About BMP Format

BMP (Bitmap) is a standard uncompressed image format developed by Microsoft, commonly used in Windows environments. BMP files store pixel data without compression, resulting in high quality but larger file sizes.

Our converter transforms your BMP images into the ICO format, which can contain multiple icon sizes in a single file. This is perfect for creating favicons, application icons, and Windows desktop shortcuts.

Pro tip: BMP files don't natively support transparency. If you need transparent icons, consider using PNG source images or enable "Preserve transparency" with 32-bit color depth.

Frequently Asked Questions

Standard BMP files don't support transparency. However, 32-bit BMP files can include an alpha channel. Our converter will preserve this if present and 32-bit color depth is selected.

For favicons, use the "Favicon" preset which includes 16×16, 32×32, and 48×48. These sizes cover browser tabs, bookmarks, and shortcuts across all major browsers.

32-bit is recommended for most uses as it provides full color range plus transparency support. Use 8-bit or 4-bit only if you need smaller file sizes and have simple graphics with few colors.

BMP files are uncompressed, storing every pixel's color data directly. This results in high quality but large file sizes. The ICO output will typically be smaller since it uses PNG compression internally.