Convert PNG to ICON, Free
Files convert instantly in your browser. 100% private, any file size, no account needed.
Drop your PNG file here
or click to browse. Any file size.
Conversion runs entirely in your browser. Your file never leaves your device.
How to convert PNG to ICON
ICO (Icon) files are the standard format for Windows application icons, browser favicons, and desktop shortcut icons. A single ICO file can contain multiple image sizes (16x16, 32x32, 48x48, 256x256) in one file, so Windows can display the right size for each context. Converting a PNG to ICO lets you create a favicon for your website or a custom icon for a Windows application or shortcut.
BoltConverter converts your PNG to an ICO file in your browser using WebAssembly. The converter generates the standard icon sizes from your source PNG and packages them into a single ICO file. Your files never leave your device.
Select your PNG file
Click the upload box or drag your PNG image onto the page. For best results, use a square PNG with at least 256x256 pixels.
PNG is resized and packaged into ICO
The converter generates standard icon sizes (16x16, 32x32, 48x48, 256x256) from your PNG and packages them into a single .ico file in your browser.
Download the ICO file
Click Download to save the .ico file for use as a favicon or Windows application icon.
Frequently asked questions
What sizes are included in the output ICO file?
The output ICO file includes standard sizes: 16x16, 32x32, 48x48, and 256x256 pixels. All sizes are generated from your source PNG.
How do I use the ICO file as a website favicon?
Name the file favicon.ico and place it in the root directory of your website. Add <link rel="icon" href="/favicon.ico"> in the <head> of your HTML for explicit browser support.
Does my source PNG need to be square?
Yes. Icon files are square, so your source PNG should have equal width and height. Non-square PNGs will be cropped or letterboxed to fit a square aspect ratio.
Are my files uploaded to the internet?
No. The conversion runs entirely in your browser using WebAssembly. Your image files never leave your device.
Can I use this for a macOS app icon (.icns)?
No. macOS uses the ICNS format for application icons, which is different from Windows ICO. This converter produces ICO format, which is for Windows and favicons.