Convert BMP to ICO - Free Online Image Converter
Online convert BMP to ICO format with our fast and free image converter. No email or registration. Batch conversion up to 100 MB with advanced compression for high quality and smaller file sizes.
Click to select multiple images
Only BMP files will be accepted
How to Convert Images
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Select your input and output formats from the dropdowns above
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Click or drag and drop your images into the upload area
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Your images will be automatically converted
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Download individual files or all files as a ZIP
BMP to ICO Conversion
BMP (Bitmap) is an uncompressed raster image format. It stores color data for every pixel without any compression, resulting in very large file sizes. While it offers high quality, its large size makes it impractical for web use.
ICO is a file format specifically designed for computer icons in Microsoft Windows. An ICO file can contain multiple images at different sizes and color depths, allowing the icon to scale appropriately across the interface.
Frequently Asked Questions
Standard BMP files are single-resolution and lack the multi-size embedding required for proper icon functionality. Converting BMP to ICO creates a true icon container, though BMP's uncompressed nature means the source is unnecessarily large for icon artwork.
Converting BMP to ICO creates a proper multi-resolution icon file embedding multiple sizes (16×16, 32×32, 48×48, 256×256) from your BMP source. Essential for creating favicons from BMP artwork, Windows application icons, or any scenario requiring multi-resolution icons. However, note that ICO internally stores images as uncompressed BMP or PNG - if using BMP source, the resulting ICO file will be large. For best results and smallest ICO files, convert your BMP to PNG first, then PNG to ICO - you get better compression in the final icon file. Only convert BMP directly to ICO if that's your only available source.
Yes, Convertlet is 100% free to use. You can convert as many images as you want without any hidden fees or subscriptions.
Absolutely. All conversions happen securely. Your files are processed and then immediately deleted from our servers to ensure your privacy.
We support a wide range of image formats.
Input formats: .jpg, .jpeg, .png, .webp, .gif, .svg, .heic, .heif, .avif, .bmp, .ico, .tiff, .dng, .eps.
Output formats: .png, .jpg, .jpeg, .webp, .avif, .bmp, .gif, .ico, .tiff.
You can convert between any of these formats easily.