What Is This Tool?
This tool allows you to convert images in the WBMP format, a simple 1-bit monochrome image commonly used for small wireless device graphics, into the ICO format, a Windows icon container used for application icons, favicons, and more.
How to Use This Tool?
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Upload your WBMP image using the provided input option
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Select ICO as the desired output format
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Optionally adjust icon sizes or color-depth variants if available
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Click convert to generate the ICO file
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Download the resulting ICO file for use on Windows or websites
Key Features
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Convert 1-bit WBMP images into ICO files supporting multiple sizes and color depths
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Create multi-resolution icons suitable for Windows applications and web favicons
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Supports packaging PNG-compressed or uncompressed bitmaps within ICO files
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Easy-to-use interface for fast and simple conversion process
Examples
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Convert a legacy WBMP logo into an ICO to serve as a favicon in older or low-resolution browsers
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Package several sizes derived from a WBMP source into one ICO file for toolbar or app icon usage
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Use converted ICO files to supply black-and-white icons in Windows installers or system trays
Common Use Cases
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Creating application and executable icons for Windows environments
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Preparing website favicons compatible with multiple browsers including older versions
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Bundling icons of different resolutions for software installation packages
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Generating simple monochrome icons for toolbars, system trays, and UI elements
Tips & Best Practices
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Remember WBMP images are strictly black-and-white; ICO conversion won’t add grayscale or color
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Use appropriate icon sizes as ICO files suit small icons up to 256×256 pixels
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Test ICO files in target environments to ensure proper display and compatibility
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Consider creating multiple size variants within the ICO for optimal appearance on different devices
Limitations
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WBMP format supports only 1-bit monochrome imagery, so ICO outputs remain binary black-and-white unless further editing is done
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ICO files are designed for small icons; WBMP images with very low resolution may appear pixelated when scaled
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Inconsistent support by tools for PNG-compressed ICO entries or legacy transparency can affect how icons display across platforms
Frequently Asked Questions
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Can converting WBMP to ICO add color or grayscale to the icon?
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No, WBMP is strictly 1-bit black-and-white. Converting to ICO maintains this binary color scheme unless additional color-depth variants are manually added afterward.
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Why use ICO format for icons instead of just using WBMP images?
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ICO files can hold multiple icon sizes and color depths in one file, which allows Windows and browsers to select the best-fitting icon for various display contexts, unlike WBMP which is limited to simple monochrome images.
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Is the ICO format suitable for large or photographic images?
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No, ICO is primarily intended for small icons, commonly up to 256×256 pixels, and is not suitable for high-resolution photographic images.
Key Terminology
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WBMP
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Wireless Bitmap, a 1-bit-per-pixel monochrome image format designed for simple black-and-white icons on early mobile devices.
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ICO
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Windows icon file format containing one or more bitmap or PNG images in various sizes and color depths used for application icons and favicons.
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1-bit Monochrome
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An image format where each pixel is either black or white, with no shades or colors.