How to Convert BMP to WBMP

WBMP (Wireless Bitmap) is a strictly 1-bit-per-pixel format, meaning every pixel is either pure black or pure white with no grayscale or color values at all. It was designed in the era of early WAP-enabled mobile phones, when devices had extremely limited graphics capabilities and needed the smallest, simplest possible image format to display basic graphics over slow wireless connections — a stark contrast to BMP's typical 24-bit color depth.

Converting a color BMP image to WBMP results in a significant loss of visual information, since the image is reduced to pure black-and-white pixels with no shades of gray in between, often using dithering to approximate grayscale appearance. This conversion is mainly relevant for specific legacy mobile or embedded display systems that still require WBMP input.

1. Install Turbo Batch Image Converter 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 WBMP.
5. Click Convert. WBMP 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 1-bit WBMP files for legacy mobile and embedded systems
• 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