Image to ICO Converter

Create one .ico file containing several icon sizes from a PNG, JPG, WebP or another image format your browser can decode. The converter builds each square icon frame on your device and packages the frames into a standard ICO container.

What makes this different from resizing an image?

An ICO is a container, not just a square picture with a renamed extension. This tool renders several independent PNG-compressed frames, records each frame's dimensions and byte offset in an ICO directory, and packages them into one file. Windows can then select a small frame for menus and a larger frame for desktop or Explorer views instead of repeatedly shrinking the same bitmap.

Choose an icon preset

The Windows preset includes sizes from 16 × 16 through 256 × 256 pixels so the operating system can choose an appropriate frame for each view. The favicon preset keeps the file smaller with 16, 32 and 48 pixel frames. A large-icon preset is available for workflows that only need 64, 128 and 256 pixel images.

Handle square and non-square images

Use Fit with transparent padding when the whole logo or illustration must remain visible. Use Fill and crop to square when the icon should reach every edge. A square source image with transparent space around the artwork usually produces the most consistent result at small sizes.

If a logo arrives on a flat white or colored canvas, enable Remove solid background. The converter clears only matching background pixels connected to the image edges, which helps preserve enclosed light areas inside the artwork. Leave this option off for photographs, gradients or backgrounds you want to keep.

How to convert an image to ICO

1. Choose or drop one or more supported image files.
2. Select the group of icon sizes required by the target application.
3. Choose whether to fit the complete image or fill and crop it to a square.
4. Process the image and download the resulting .ico file.

Local processing and compatibility

The source image stays on your device during the normal conversion workflow. ICO frames are stored as PNG-compressed 32-bit images to preserve transparency and keep the implementation browser-first. Very old applications that require legacy bitmap-only ICO frames may not accept this output, so keep the source image and test the downloaded icon in its final destination.