PNG to ICO Converter
Convert PNG images to ICO format for favicons and Windows icons. Multiple sizes in one file. Free, fast, and secure — no upload to servers.
Drop PNG/JPG image here
or click to browse your files
How to Convert PNG to ICO
Upload Image
Select or drag and drop your PNG or JPG image. Works best with square images (e.g., 512×512).
Choose Sizes
Select which icon sizes to include. For favicons, use 16×16, 32×32, and 48×48. For Windows icons, consider adding larger sizes.
Download ICO
Click "Download ICO" to get your multi-size icon file. The ICO will contain all selected sizes in one file.
Why Use Our PNG to ICO Converter?
Client-Side Processing
All conversion happens in your browser. Your images never leave your device, ensuring complete privacy and security.
Multiple Sizes in One File
ICO files can contain multiple resolutions in a single file. Perfect for favicons and Windows icons that adapt to different contexts.
Instant Conversion
No waiting, no server uploads. Convert images to ICO format instantly with high-quality resampling.
Favicon Ready
Generate favicons for your website with standard sizes (16×16, 32×32, 48×48) or create custom Windows application icons.
High-Quality Scaling
Uses advanced image smoothing algorithms to ensure sharp, clean icons at all sizes.
Completely Free
No watermarks, no limits, no signup. Convert unlimited images to ICO format absolutely free.
Frequently Asked Questions
What is an ICO file?
ICO is the icon file format used by Windows and web browsers for favicons. Unlike PNG or JPG, a single ICO file can contain multiple image sizes, allowing the operating system or browser to choose the most appropriate size for different contexts.
What sizes should I use for a website favicon?
For website favicons, the standard sizes are 16×16 (browser tabs), 32×32 (taskbar/bookmarks), and 48×48 (Windows desktop shortcuts). Modern websites often also include 64×64 and 128×128 for high-DPI displays.
Can I convert JPG to ICO?
Yes! This tool accepts both PNG and JPG images. The converter will automatically process any image format supported by your browser and create a proper ICO file.
Should my source image be square?
Yes, square images work best for ICO conversion (e.g., 512×512). If your image is not square, the converter will scale it to fit each size while maintaining the aspect ratio, which may result in letterboxing.
How do I use the ICO file as a favicon?
Upload the ICO file to your website's root directory and add this to your HTML <head>: <link rel="icon" href="/favicon.ico" type="image/x-icon">. Modern browsers will automatically detect and use it.
Why include multiple sizes in one ICO file?
Different contexts require different icon sizes. Browser tabs use 16×16, while Windows desktop shortcuts might use 48×48 or larger. Having multiple sizes ensures your icon looks crisp at every resolution.
Does this tool support transparency?
Yes! If your source PNG has transparency, it will be preserved in the ICO file. This is important for favicons and icons that need to look good on different backgrounds.
What's the maximum size I can include?
This tool supports sizes up to 256×256 pixels. While ICO technically supports larger sizes, 256×256 is the practical limit for most use cases. For larger icons, consider using PNG directly.