Convert PNG to ICO
Convert PNG to ICO free in your browser. No upload, no signup, no watermark. Files stay on your device.
drop a .png file
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how to convert png to ico
Drop your PNG file
Drag your PNG file into the drop zone above, or click the box to pick a file from your computer or phone. The browser reads the file directly — nothing uploads.
Click Convert
The page runs Canvas API on your device to decode the Portable Network Graphics and encode it as Windows Icon. Most conversions finish in a few seconds; large or codec-heavy files (RAW, video) can take longer.
Download the ICO file
When the conversion finishes, the ICO file is ready to download. Save it anywhere on your device.
FAQ
common questions
What sizes does the ICO file include?
The converter bundles your PNG at multiple standard icon sizes — 16×16, 32×32, 48×48, and 256×256 — into a single .ico file. Windows automatically picks the closest size for each context (16 for the address-bar favicon, 32 for taskbar buttons, 48 for desktop shortcuts, 256 for high-DPI displays). One ICO file covers every situation.
What should my source PNG resolution be?
At least 256×256 pixels, ideally square. The converter downscales to each target size from your source — starting larger gives the smaller sizes more pixels to work from and produces sharper results. A 512×512 or 1024×1024 source is even better. If you start with a 32×32 source, the 256×256 entry will be a blurry up-scale and look bad on retina monitors.
Does the ICO preserve transparency from my PNG?
Yes — ICO supports an alpha channel, and the converter preserves any transparency in your source PNG at every embedded size. Transparent regions stay transparent across all 16 / 32 / 48 / 256 px variants. Modern Windows expects favicons and app icons to have transparent backgrounds, so this is what you want for clean integration with light and dark UI themes.
Where do I use the resulting ICO file?
Most commonly as a website favicon — save the ICO as favicon.ico at your site root, and Windows browsers, bookmark bars, and shortcuts will use it automatically. ICOs are also used as Windows .exe / .lnk icons (right-click → Properties → Change Icon) and for branded folder icons. macOS and Linux typically use PNG or SVG instead.
Why is the ICO file bigger than my source PNG?
Because the ICO contains your image at multiple sizes plus header data, not just one. A typical multi-size favicon is 100–300 KB. If size matters more than coverage, single-size favicons exist (just 32×32, say) but they look chunky on high-DPI screens — most modern sites pay the size cost for the multi-resolution version.