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ICO Converter

Convert images to ICO format for favicons and Windows icons. Create multi-size ICO files with 16x16, 32x32, 48x48, 64x64, 128x128, and 256x256 pixel dimensions. Professional favicon generator with batch processing.

📁 Upload Your Images

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Drop image files here to create ICO
Supports JPG, PNG, WebP, BMP, GIF • Maximum file size: 50MB per file

Selected Files (0)

📐 Select ICO Sizes

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16x16
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32x32
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48x48
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64x64
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128x128
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256x256
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Multi-Size

⚙️ Icon Settings

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High Quality
Best quality for professional use
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Balanced
Good quality with smaller file size
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Optimized
Optimized for web favicons

⚡ ICO Generation

👁️ Generated ICO Files

Why Use Our ICO Converter?

Create professional favicons and Windows icons with multi-size support and perfect quality.

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100% Private & Secure

All conversions happen in your browser. Your images never leave your device for maximum security and privacy.

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Multi-Size ICO

Generate ICO files with multiple sizes in one file or individual sizes. Perfect for favicons and Windows icons.

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Favicon Ready

Creates web-ready favicon files optimized for all browsers and devices with proper formatting.

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Batch Processing

Convert multiple images to ICO format simultaneously and download all results in a ZIP file.

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Quality Preservation

Advanced algorithms ensure optimal quality preservation when creating ICO files from any source format.

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Completely Free

No watermarks, no limits, no registration required. Always free to use with unlimited ICO conversions.

Complete Guide to ICO Files and Favicon Creation

Everything you need to know about creating ICO files for favicons, Windows icons, and web applications.

⭐ What is ICO Format?

ICO is a graphics file format used for computer icons in Microsoft Windows. It can contain multiple images at different sizes and color depths, making it perfect for favicons and application icons.

  • Best for: Favicons, Windows icons, application icons
  • Sizes: 16x16, 32x32, 48x48, 64x64, 128x128, 256x256
  • Transparency: Full support including alpha channel
  • Browser Support: Universal compatibility

🌐 Favicon Requirements

Favicons are small icons displayed in browser tabs, bookmarks, and address bars. Modern websites require multiple sizes for different devices and contexts.

  • Standard favicon: 16x16 and 32x32 pixels
  • High-DPI displays: 48x48 and 64x64 pixels
  • Touch icons: 128x128 and 256x256 pixels
  • File name: favicon.ico (placed in root directory)

📱 Multi-Size ICO Benefits

A single ICO file can contain multiple image sizes, ensuring your icon looks crisp at any display size. This is essential for modern responsive web design.

  • Single file contains all sizes
  • Automatic size selection by browser
  • Reduced HTTP requests
  • Better user experience across devices

🎨 Design Best Practices

Creating effective ICO files requires attention to design principles that work well at small sizes. Simple, bold designs typically work best for favicons.

  • Use simple, recognizable shapes
  • High contrast colors
  • Avoid fine details that disappear at small sizes
  • Test appearance at all target sizes

💻 Windows Icon Usage

ICO files are the standard format for Windows application icons, desktop shortcuts, and file type associations. They support transparency and multiple resolutions.

  • Desktop shortcuts: 32x32 and 48x48 pixels
  • Application icons: 16x16, 32x32, 48x48, 256x256
  • Taskbar: 16x16, 24x24, 32x32 pixels
  • Windows Explorer: Various sizes depending on view

🔧 Implementation Guide

Proper implementation of ICO files ensures maximum compatibility across browsers and devices. Follow these guidelines for best results.

  • Place favicon.ico in website root directory
  • Add HTML link tag for explicit reference
  • Include Apple touch icon for iOS devices
  • Test on multiple browsers and devices

Frequently Asked Questions

How do I create a multi-size ICO file? +
Select "Multi-Size" option in the ICO size selector. This creates a single ICO file containing multiple image sizes (16x16, 32x32, 48x48, 64x64, 128x128, 256x256) in one file. This is the recommended approach for favicons as browsers automatically choose the appropriate size.
What size should I use for website favicons? +
For website favicons, use the "Multi-Size" option which includes 16x16, 32x32, 48x48, and 64x64 pixel sizes. This ensures your favicon displays clearly in browser tabs, bookmarks, and address bars across all devices and browsers. Modern browsers will automatically select the best size.
Can I convert multiple images to ICO at once? +
Yes! Our ICO converter supports batch processing. Upload multiple images and they'll all be converted to ICO format with your selected size and quality settings. You can download individual ICO files or get all converted files in a single ZIP archive.
Is this ICO converter free to use? +
Yes, our ICO converter is completely free with no registration required. You can convert unlimited images to ICO format without any charges, watermarks, or restrictions. All features including batch processing, multi-size ICO creation, and ZIP download are available at no cost.
Are my images safe when using this converter? +
Absolutely! All ICO conversions happen entirely in your browser using client-side processing. Your images never leave your device or get uploaded to our servers. This ensures complete privacy and security of your files, making it perfect for sensitive branding materials or personal images.
What image formats can I convert to ICO? +
You can convert JPG, PNG, WebP, BMP, and GIF images to ICO format. PNG images work best as they support transparency, which is important for favicons. The converter automatically handles transparency preservation and optimizes the conversion for the ICO format.
How do I add a favicon to my website? +
After creating your ICO file, save it as "favicon.ico" and upload it to your website's root directory. Add this HTML tag in your webpage's <head> section: <link rel="icon" type="image/x-icon" href="/favicon.ico">. Most modern browsers will automatically detect favicon.ico in the root directory.
What's the difference between ICO and PNG for favicons? +
ICO files can contain multiple sizes in one file and have universal browser support, while PNG favicons require separate files for each size. ICO is the traditional standard with better compatibility, especially for older browsers and Windows systems. Many websites use both ICO for compatibility and PNG for modern browsers.
Can ICO files be used for mobile app icons? +
ICO files are primarily for Windows and web favicons. For mobile apps, iOS uses PNG files (Apple Touch Icons) and Android uses PNG/WebP. However, you can convert your ICO to PNG for mobile use. Create separate optimized icons for each platform using their specific size requirements.
Why does my ICO look blurry at small sizes? +
Small ICO files (16x16, 32x32) require simple designs without fine details. Complex images with small text or intricate details become blurry when scaled down. Use bold, simple shapes with high contrast colors. Consider designing separate optimized versions for each size rather than just scaling down one large image.

Related Icon & Image Tools

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200+ Free Tools

Complete collection of converter tools, generators, and utilities. All completely free to use without registration.

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Fast & Secure

Lightning-fast conversions that happen securely in your browser. Your data never leaves your device.

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Mobile Optimized

All tools work perfectly on mobile phones, tablets, and desktop computers with responsive design.

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Privacy First

No tracking, no ads, no data collection. Your privacy is our priority with every conversion.