Convert PNG to ICO Online Free

Need a favicon for your website? AllConvert turns any PNG into an ICO file in seconds, right in your browser. No file upload, no account, no software to install.

Why convert PNG to ICO?

ICO is the classic icon format that browsers, Windows and many applications expect. The most common reason to create one is a website favicon — the small icon that appears in browser tabs, bookmarks and search results. While modern browsers accept PNG favicons, ICO remains the most universally compatible choice and works everywhere, including older browsers and Windows desktop shortcuts.

What happens during the conversion?

AllConvert renders your PNG onto a canvas and packages it as an ICO file. Browsers cap ICO dimensions at 256×256 pixels, so larger images are automatically scaled down while keeping their aspect ratio. For the sharpest result, start from a square image that is 256×256 or larger — a square source avoids any letterboxing and gives you a crisp icon at every size.

Tips for a great favicon

Keep the design simple: favicons are displayed as small as 16×16 pixels, so fine detail and thin text disappear. Bold shapes, strong contrast and a transparent or solid background work best. Once you have your ICO, drop it in your site root as favicon.ico or reference it with a <link rel='icon'> tag.

How to convert

1. Open AllConvert and drop your PNG file onto the page.
2. Select ICO from the format dropdown on the file card.
3. Click Convert and download your result.

The entire process runs locally in your browser. Nothing is uploaded, and it works on desktop and mobile, in Chrome, Firefox, Safari, and Edge.