About this tool
A favicon or Windows icon is not one image but a bundle of the same picture at several sizes, so the browser tab, the bookmarks bar, the taskbar, and the desktop each get a version drawn for their pixel size. This tool builds that bundle from a single PNG: tick the sizes you need and it scales the image to each one, wraps them in a standard ICO container, and keeps the transparency.
Downscaling is done in steps, so a 512 pixel logo still reads clearly at 16 pixels instead of turning into a smudge. For pixel art, switch to crisp scaling to keep the hard edges. The result works as favicon.ico on any website and as an icon for Windows programs, shortcuts, and folders.
How to use it
- Drop your PNG, WebP, GIF or BMP files into the box above, or click to browse. Nothing is uploaded.
- Adjust the options if you want; the defaults suit most files.
- Click the button and wait a moment.
- Download the results individually or all at once as a ZIP.
Questions
Which sizes should a favicon have?
16, 32, and 48 pixels cover browser tabs, bookmarks, and the Windows taskbar. Add 256 if the same file will be used as a Windows app or shortcut icon.
Does the ICO keep transparency?
Yes. Each size is stored as a PNG with full alpha transparency, which every current browser and Windows since Vista support.
My image is not square. What happens?
It is fitted inside the square with transparent padding, so nothing is cropped or stretched. Crop it to a square first if you want it to fill the icon.
How do I use the favicon on my site?
Upload it as favicon.ico in the root of your site and add <link rel="icon" href="/favicon.ico"> to the page head. Browsers also pick up /favicon.ico automatically.
Is it free, are files uploaded, which browsers work: the general questions are answered once for the whole site.