Convert PNG to ICO
ICO is the standard favicon format used by web browsers to display the small icon in browser tabs, bookmarks, and address bars. Unlike regular image formats, an ICO file can bundle multiple sizes (16×16, 32×32, 48×48) into a single file, ensuring your icon looks crisp at every resolution. Our Favicon Generator handles this automatically — upload any PNG and get a ready-to-use .ico file, all processed in your browser.
Use Our Dedicated ICO Generator
The ICO format requires specialized encoding that goes beyond simple image conversion. Our dedicated tool handles multi-size bundling, proper binary headers, and standards-compliant output.
Open ICO Generator →Frequently Asked Questions
What is an ICO file?
ICO (Icon) is a file format designed by Microsoft for small images used as program and website icons. A single .ico file can contain multiple image sizes so that the operating system or browser can pick the best resolution for each context.
Why can't I just rename a PNG to .ico?
A renamed PNG file is not a valid ICO file. The ICO format has a specific binary structure that wraps one or more images with a directory header. Our Favicon Generator properly encodes your PNG into a standards-compliant .ico file.
Is the conversion private and secure?
Yes. Your PNG image is processed entirely inside your browser. It is never uploaded to a server. The generated .ico file is created locally and downloaded directly to your device.