Convert Images to ICO - Free Online Image Converter
Online convert any image 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
How to Convert Images
1
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
images to ICO Conversion
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
Convert any image format to ICO for creating multi-resolution favicons and Windows application icons. Unlike standard image formats, ICO files are containers that can embed multiple image sizes (typically 16×16, 32×32, 48×48, 64×64, 128×128, 256×256) within a single file. This allows browsers, operating systems, and applications to automatically select the optimal resolution for different contexts - small sizes for browser tabs and bookmarks, larger sizes for desktop shortcuts and taskbars. Essential for professional website branding (favicons appear in browser tabs, bookmarks, search results), Windows software development, and ensuring your icons remain crisp across all display sizes and contexts.
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.