What icon sizes should I include in my ICO file?

For favicons, include 16x16, 32x32, and 48x48 at minimum. For Windows application icons, add 64x64, 128x128, and 256x256. Our converter lets you select multiple sizes to create a single ICO file with all sizes embedded.

What is an ICO file used for?

ICO files are primarily used for website favicons (the small icon in browser tabs) and Windows application icons. They can contain multiple image sizes in one file, allowing the operating system to use the best size for each context.

How do I create a favicon for my website?

Create or prepare your logo/icon as a PNG, then use our converter to generate an ICO file with 16x16, 32x32, and 48x48 sizes. Save it as 'favicon.ico' and place it in your website's root directory.

Can I use ICO files on Mac or Linux?

While ICO is primarily a Windows format, most modern browsers on Mac and Linux display ICO favicons correctly. However, you may want to also provide PNG favicons for better cross-platform compatibility.

Does the ICO converter support transparency?

Yes! Our PNG to ICO converter preserves transparency from your PNG source image, which is important for favicons that need to look good on any background color.

Convert PNG to ICO

Free, fast, and private. Create multi-size icons for Windows apps.

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📖 ICO Converter Guide

Why Convert PNG to ICO?

ICO is the standard icon format for Windows and web favicons. Unlike other image formats, a single ICO file can contain multiple image sizes (from 16×16 to 256×256), allowing operating systems and browsers to use the best size for each context.

Best Use Cases for ICO

• Website Favicons: The small icon displayed in browser tabs and bookmarks
• Windows Applications: Program icons in the taskbar and file explorer
• Desktop Shortcuts: Custom icons for files and folders
• Browser Extensions: Extension icons in the toolbar

Icon Size Guide

16x16 - Small Icons

Used for taskbar, small list views, browser favicons

24x24 - Toolbar Icons

Used for application toolbars, Windows 7+ taskbar overlays

32x32 - Medium Icons

Default size for desktop shortcuts and file icons

48x48 - Large Icons

Larger list views and icon view in Explorer

64x64 - Extra Large Icons

Windows XP+ extra large icon view, high-res displays

128x128 - Jumbo Icons

Windows Vista+ jumbo view, Retina/4K displays

256x256 - HD Icons

Windows Vista+ maximum size, ultra-high DPI displays, modern taskbar

Privacy & Security

✅ 100% Client-Side: All conversions happen in your browser. Files never leave your computer.
✅ No Upload: We don't have servers to store your files. Everything is processed locally.
✅ No Tracking: We don't track what you convert or collect any personal data.
✅ Free Forever: No hidden costs, no subscriptions, no premium tiers.

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