Convert PNG to ICO for Windows Icons and Favicons
Turn a PNG image into a proper Windows ICO file — ready to use as a desktop app icon, executable icon, or website favicon, with multiple resolutions bundled in.
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Why Convert PNG to ICO?
Windows apps, executables, and website favicons specifically require the ICO format — a PNG alone won't work as a taskbar icon, desktop shortcut icon, or in a favicon.ico file, regardless of how the image looks.
Unlike PNG, ICO can bundle several resolutions of the same image into a single file (commonly 16×16, 32×32, 48×48, and 256×256), so the right size displays automatically whether it’s shown as a tiny favicon tab icon or a large desktop icon.
Converting a square, high-resolution PNG gives the cleanest result — Windows and browsers pick the closest matching size from the bundled resolutions rather than stretching a single low-resolution image.
How to Convert PNG to ICO
- Upload your PNG file (square, high-resolution works best).
- MiConvert generates the standard bundled icon resolutions and packages them into one ICO file.
- Download the converted ICO file.
- Use as a favicon.ico, app icon, or Windows executable icon.
Key Features of MiConvert PNG to ICO
- Bundles multiple standard resolutions (16×16 to 256×256) into a single ICO file
- Ready to use as a Windows app icon, executable icon, or website favicon
- Preserves alpha transparency from your PNG
- Best results from a square, high-resolution source image
- Free for files up to 50MB, 100MB for registered accounts
Video Tutorial
Watch this step-by-step tutorial to learn how to convert PNG files to ICO format online for free using MiConvert.com. No software installation required.
Frequently Asked Questions
Does the converted ICO include multiple sizes automatically?
Yes — from a single PNG, we generate the standard bundled resolutions (16×16, 32×32, 48×48, and 256×256) inside one ICO file, so it displays correctly at any icon size.
What PNG size should I upload for the best result?
A square PNG of at least 256×256 pixels gives the cleanest result across all bundled sizes, since smaller sizes are downscaled from your source rather than upscaled.
Will transparency be preserved?
Yes — ICO supports alpha transparency, so transparent backgrounds in your PNG carry over correctly.
Can I use this for a website favicon?
Yes — the output ICO file works directly as a favicon.ico, the standard format browsers look for.
What if my PNG isn't square?
Non-square images are center-cropped or padded to fit the standard square icon sizes; for the most predictable result, start with a square source image.