Convert Portable Network Graphics files to Windows icon / favicon — free, private and right in your browser.
When is it useful? PNG to ICO creates a favicon for your website or an icon for a Windows shortcut, folder or program from any PNG logo.
Good to know: one ICO file is made with six sizes inside — 16, 32, 48, 64, 128 and 256 pixels — so it looks right in browser tabs, on the desktop and in File Explorer. Non-square logos are centred on a transparent square, and transparency in your PNG is kept.
| Your PNG | Result in ICO |
|---|---|
| One ICO file | Contains 16, 32, 48, 64, 128 and 256 px sizes |
| Non-square logos | Centred on a transparent square |
| Transparency | Kept |
| Sharpest result | A square PNG of at least 256 × 256 px |
| Websites | Upload favicon.ico to the main folder |
Browser processing: your files are processed on your own device and are never uploaded to our server.
ICO is the icon format of Windows and the classic format for website favicons — the small picture in the browser tab. One ICO file can hold the same icon in several sizes, so Windows and browsers can pick the size that looks sharpest in each place.
Your PNG is drawn into six square sizes: 16, 32, 48, 64, 128 and 256 pixels, and all six are packed into one .ico file. Non-square pictures are scaled to fit and centred on a transparent square, so nothing is stretched, and transparent areas of your PNG stay transparent.
For a website, upload favicon.ico to the main folder of your site; most browsers find it automatically, or you can add a link tag in your page head. For Windows, right-click a shortcut or folder, choose Properties → Change Icon, and select the .ico file.
The icon looks blurry in the browser tab: at 16 pixels, detailed logos become unreadable — use a simple symbol or one letter. The browser still shows the old icon: browsers cache favicons; clear the cache or open the site in a private window. White edges appear: use a PNG with a truly transparent background.
Design icons as simple bold shapes, start from a square PNG of at least 256 × 256 pixels, and test how the icon looks on both light and dark backgrounds.