How to convert PNG to ICO
- Drop your PNG (or JPG or SVG) on the box. Square images of at least 256 × 256 pixels give the best result.
- Choose the shape and padding, and tick the sizes to include under ICO sizes. 16, 32 and 48 px cover browsers and Windows; add 256 for high-resolution Windows icons.
- Click favicon.ico to download, or Download all for the ICO plus PNG app icons.
About the ICO format
An ICO file is a container that holds several images of different sizes, so Windows and browsers can pick the sharpest one for each place: 16 px in a browser tab, 32 px on the taskbar, 48 px in Explorer and 256 px in large icon views. Since Windows Vista and in every modern browser, the images inside can be stored as PNG, which keeps full transparency and small file sizes. That is how this converter builds the file.
For websites, put favicon.ico in the root of your site; browsers request /favicon.ico automatically. For desktop shortcuts and apps, include 256 px. Non-square images are centred with transparent padding rather than stretched. Your image is processed locally and never uploaded.
FAQ
What size should an ICO file be?
Include 16, 32 and 48 px for favicons; add 256 px for Windows application icons.
Does ICO support transparency?
Yes. PNG-based ICO files keep full alpha transparency.
Can I convert JPG to ICO?
Yes. JPG has no transparency, so the background stays as in the photo; choose a circle shape to crop it round.