Turn your PNG images into ICO icons in seconds. Conversion happens in your browser, so your files are never uploaded to a server.
or drop them here. You can also paste an image (Ctrl+V).
Free · No sign-up · No upload
Files
These sample files are generated on the page. Convert them to try it out, or add your own.
Click “Choose PNG files” or drop them on the page. You can add several at once.
ICO is already selected. The file will hold icon sizes from 16 to 48 px, and up to 256 px if the source image is large enough.
Click “Convert”, then download your ICO file. With several files, grab everything at once as a ZIP.
Starting from a PNG is the best way to make a favicon or a Windows icon: its transparency is kept in every size inside the ICO file, so the icon blends into a light tab as well as a dark theme. The browser or Windows then picks the most suitable version, tiny in a tab, larger for a desktop shortcut.
At 16 px a detailed logo quickly becomes unreadable, so go for a simple shape, thick strokes and little text. Also crop the transparent margins around the design, which are kept as they are and make the icon look smaller. For the iPhone home screen, sites use a 180 × 180 px PNG instead (apple-touch-icon), so keep your original PNG as well.
A lossless image format introduced in 1996. It keeps every pixel and supports transparency, which makes it ideal for screenshots, logos and illustrations. Photos are larger in PNG than in JPG.
The Windows icon format. One file holds several sizes, from 16 to 256 pixels; it is the classic format for website favicons.
Rename the file favicon.ico and put it at the root of the site: browsers look for it there by default. You can also declare it in the head of your pages, with a link tag of type icon. Then clear your browser cache, which often keeps the old icon for a while.
Always 16, 24, 32 and 48 px, then 64, 128 and 256 px if the longest side of your image reaches those values. A 100 px image therefore gives sizes from 16 to 64 px. Each size is scaled from the original, then saved losslessly.
No. The file is read and converted by your browser, on your device. Nothing is sent to a server, and nothing is kept after you close the page.
The image is resized to the standard icon sizes (16, 24, 32 and 48 px, plus 64, 128 and 256 px when it is large enough), then saved losslessly. Start from an image of at least 256 px for a crisp icon.
As many as you like, for free and without signing up. Add them all, then download the results one by one or in a single ZIP. The maximum size depends on your device and browser, with a few caps that protect its memory (for example 20,000 files per archive or 5 million filled cells per workbook: see the home page FAQ); a file over one of them is not converted, and a message says so.
Formatomat is designed for recent browsers on computers, iPhone and Android, with no app to install. A conversion the browser cannot do (a format it cannot read or write) is refused with a message that says so.
Drop to add your files