Convert images to ICO icons free — transform PNG or JPG to ICO in multiple sizes from 16x16 to 256x256. Ideal for favicons. Browser-based.
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Free online tool to convert images to ICO files. Generate icons in multiple sizes (16x16, 32x32, 48x48, 256x256).
Yes, multiple sizes from 16x16 to 256x256 can be bundled in a single ICO file.
Yes, save the generated ICO as favicon.ico in your website root to use it immediately.
A 16×16 icon has only 256 pixels, so cramming a whole logo into it always turns to mush. Keep one letter of the company name or a single symbolic shape and throw the rest away. Draw strokes at least 2 px thick and put a large brightness gap between shape and background, or the icon disappears in a crowded tab bar. When it is done, load it in a real browser tab and check it against both a light and a dark theme.
Browser tabs still accept favicon.ico, but a single 32×32 PNG covers most cases today. Add a 180×180 apple-touch-icon.png for the iPhone home screen, plus 192×192 and 512×512 PNGs registered in the web app manifest for Android installs. An SVG favicon alongside them looks sharper on high-density displays and can even switch color for dark mode.