ICO to BMP Converter

Summary

This tool converts ICO (icon) files to BMP format entirely inside your browser. ICO files are multi-resolution containers — a single .ico can embed images at 16×16, 32×32, 48×48, 64×64, 128×128, and 256×256 pixels. After loading your file, the tool lists every available size so you can pick the resolution you need and download the result as a BMP file. No files are ever sent to a server — your favicon stays completely private on your device.

How it works

1. Upload any ICO or favicon file by clicking the upload area or dragging it in.
2. The browser reads the ICO binary and decodes each embedded image size using the Canvas API.
3. A grid of available sizes appears — click any tile to select that resolution.
4. A preview of the selected size is shown with a checkerboard background to visualize transparency.
5. Click "Download BMP" to save the chosen resolution as a BMP file.

Use cases

• Convert a favicon to BMP for use in legacy Windows applications that require BMP format.
• Extract a specific resolution from a multi-size ICO as a BMP for editing in Paint or older tools.
• Prepare icon assets for embedded systems or older software that only accept BMP files.
• Recover a usable BMP image from an ICO when no original BMP source is available.
• Convert Windows application icons to BMP for compatibility with older design tools.
• Export favicons as BMP for use in Windows desktop shortcut customization.
• Preview all sizes embedded inside an ICO before deciding which resolution to export.
• Convert ICO files to BMP for use in resource editors and legacy Win32 applications.

Frequently Asked Questions