How to Convert BMP to ICO

ICO is the format Windows uses specifically for icons — application icons, file type icons, and website favicons — and a single ICO file can bundle multiple sizes of the same image (commonly 16×16 up to 256×256 pixels) so the operating system can pick the right resolution depending on context. BMP has a particularly close relationship to ICO historically, since the ICO format itself stores its image data internally in a structure derived from BMP, which makes BMP a natural and well-supported source for this conversion.

This makes BMP to ICO a common workflow for turning a simple logo or graphic, originally created or exported as BMP, into a usable Windows icon file.

1. Install Batchify Image Converter and Resizer Pro on your Windows PC.
2. Open the app and select Batch Mode for multiple files, or Individual Mode for a single BMP.
3. Drag your BMP file or folder into the app window, enabling recursive folder scanning if needed.
4. Set the "From" format to BMP and the "To" format to ICO.
5. Click Convert. ICO files are written to the output folder, fully offline.

• 100% offline — your images are never uploaded anywhere
• Bulk conversion of entire folders, including sub-folders, in one click
• Produces standard Windows ICO files for icons and favicons
• Multi-core processing for fast handling of large batches
• Option to delete original BMP files automatically after conversion
• No recurring subscription or hidden upload limits

If you only need straightforward format conversion without RAW or HEIC support, Batchify Image Converter and Resizer Lite covers this exact BMP-to-ICO conversion in a lighter, more focused app.