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Image to ICO Converter

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Convert any image — PNG, JPG, WEBP, GIF, or BMP — into a proper multi-resolution .ico file right in your browser. Pick the sizes you need, click download, and get a standards-compliant ICO file with embedded PNG frames for crisp rendering at every size.

Drag an image here, paste from clipboard (Ctrl+V), or

Supports PNG, JPG, WEBP, GIF, BMP

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How to use Image to ICO

  1. Drag and drop your image onto the upload zone, paste it from the clipboard, or click Browse to select a PNG, JPG, WEBP, GIF, or BMP file.
  2. Check the boxes for the sizes you want to include in the .ico file — 16×16 and 32×32 are checked by default, and you can add 48, 64, 128, or 256 as needed.
  3. Click Download .ico to generate and save the multi-resolution icon file instantly.

What is Image to ICO?

The ICO format supports embedding multiple resolutions in a single file, letting Windows and browsers automatically pick the best size for each context — whether it's a 16×16 taskbar icon or a 256×256 high-DPI display icon. This tool embeds each chosen size as a lossless PNG frame inside the ICO container, which is the modern approach recommended over raw BMP data.

All conversion happens entirely in your browser using the Canvas API and pure JavaScript. No file is uploaded to any server, so your images stay completely private. The tool center-crops non-square images to avoid distortion, and uses high-quality downsampling for each resolution.

This is especially useful when you need a custom .ico for a Windows application, a browser extension, or a website favicon that supports legacy IE and older systems which require an actual .ico file rather than a PNG.

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FAQ

What image formats can I convert to ICO?
You can upload PNG, JPG, JPEG, WEBP, GIF, and BMP files. For best results, use a high-resolution square image (at least 256×256 pixels) so all smaller sizes are sharp downscales rather than upscales.
How is the ICO file built in the browser?
Each chosen resolution is drawn onto an HTML canvas, exported as a PNG blob, and then assembled into a standards-compliant ICO binary using the ICONDIR + ICONDIRENTRY format with embedded PNG payloads. No server or external library is needed.
Which sizes should I include for a website favicon?
For a website favicon, 16×16 and 32×32 cover the vast majority of browsers. Adding 48×48 provides a good fallback for Windows taskbar pinning. Sizes 64 and above are mainly useful for desktop application icons.

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