Convert PNG to ICO Online - Free Icon Converter

Transform your PNG images into multi-size ICO icon files with our free online converter. PNG to ICO conversion is ideal for creating favicons and Windows icons from logos and graphics that include transparency. Our tool generates a single ICO file with embedded PNG images at 16, 32, 48, and 256 pixels, preserving transparency when no background color is set.

What is PNG to ICO Conversion?

PNG to ICO conversion transforms Portable Network Graphics files into Windows Icon format. Unlike JPG, PNG supports full alpha transparency, making it the preferred source format for icons with transparent backgrounds. Our converter packages multiple PNG resolutions into one ICO file using the modern PNG-embedded format.

Key Features

Multi-Size ICO Output: Creates 16, 32, 48, and 256 pixel icons in one file
Transparency Support: Preserves PNG transparency when no background is set
Batch Processing: Convert multiple PNG files at once
Optional Background: Add a background color if needed for opaque icons
Browser-Safe Encoding: Client-side ICO encoder using Canvas API
Secure Processing: All conversions happen locally in your browser

When to Convert PNG to ICO

Logo Favicons: Convert brand logos with transparent backgrounds to favicon.ico
App Icons: Create Windows application icons from PNG artwork
UI Icons: Package interface icons for desktop applications
Cross-Platform Icons: ICO works on Windows, and browsers accept it as favicon

How to Convert PNG to ICO

Select Files: Choose one or more PNG images to convert
Background (Optional): Leave empty to keep transparency, or set a solid background color
Convert: Click "Convert to ICO" to build multi-size icon files
Download: Save your ICO files individually or download all at once

Technical Details

The converter renders each PNG onto a square canvas at four standard icon sizes, exports each as a PNG blob, and assembles them into a valid ICO file with proper ICONDIR headers and directory entries. This PNG-embedded ICO format is supported by Windows Vista and later, and all modern web browsers.

For photographic source images, try our JPG to ICO converter. You can also generate a complete favicon set or convert PNG to GIF for animated or palette-optimized graphics.

Frequently Asked Questions

Will transparency be preserved in the ICO file?

Yes, when you leave the background color field empty, the converter preserves the PNG transparency in the generated ICO file. Each embedded PNG image retains its alpha channel, so transparent areas remain transparent in the final icon.

What icon sizes are included?

Each ICO file contains four resolutions: 16x16, 32x32, 48x48, and 256x256 pixels. These sizes cover browser favicons, taskbar icons, desktop shortcuts, and high-DPI displays.

When should I set a background color?

Set a background color only if you want to replace transparent areas with a solid color. This is useful when your icon will always appear on a specific background, or when the target application does not handle transparency well.

Can I convert multiple PNG files at once?

Yes, batch conversion is supported. Select multiple PNG files and convert them all in one operation. Use "Download All" to save every ICO file quickly.

Is this converter free and secure?

Yes, the tool is completely free with no registration required. All processing happens in your browser, so your images are never uploaded to any server.

How does PNG to ICO differ from using a favicon generator?

This converter focuses specifically on creating ICO files from existing PNG images. A favicon generator like our Favicon Generator can create ICO files plus additional formats like Apple touch icons, Android icons, and installation HTML code from scratch.

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PNG to ICO Converter