BMP to ICO converter



Supported image types: BMP
Max file size: 200MB. All uploaded files are automatically deleted 1 hour after upload.

Convert BMP (Windows Bitmap) to ICO

Convert uncompressed BMP bitmap images into properly structured Windows .ico files. Although classic Windows icons store DIB (Device-Independent Bitmap) data internally, renaming a .bmp file to .ico does not create a valid icon header or directory table, and 256×256 icons require embedded PNG compression. This converter builds a compliant ICO file with the proper icon directory entries.

Available Icon Dimensions

Select any standard icon size from 16×16 (browser favicons and small list icons) to 256×256 (large Windows desktop icons), or pick Multi-size to generate a single .ico container holding 16×16, 32×32, 48×48, 64×64, 128×128, and 256×256 versions together.

Transparent Backgrounds

Most 24-bit BMP files do not include an alpha channel. If your bitmap has a solid background color (such as white or magenta) that you want to make transparent in the final icon, you can run the image through our background removal tool before or after converting.

Related tools: PNG to ICO | JPG to ICO | BMP to PNG | ICO to PNG