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

Create favicon.ico files, bundle the right favicon sizes, and export PNG icons for websites, apps, and Windows shortcuts.

Drop your PNG file here or click to upload

Only PNG files

No size limit

📖 ICO Converter Guide

Why Convert PNG to ICO?

ICO is the format browsers and Windows apps still expect for many icon workflows, especially favicon.ico files. The main advantage is that a single ICO can bundle several sizes together, which helps websites, bookmarks, shortcuts, and operating systems choose the best icon size automatically.

Best Use Cases for ICO

• PNG to favicon.ico: Create the browser-tab icon most websites still ship from the root folder
• Favicon Sizes: Bundle 16x16, 32x32, 48x48, and larger sizes into one file
• Website & App Icons: Use the same source PNG for site branding and app shortcuts
• Windows Applications: Show crisp icons in Explorer, taskbar, and desktop views

Popular PNG to ICO jobs

PNG to favicon.ico

Start with a square PNG logo or mark, then export an ICO file you can place in your site root as favicon.ico.

Best favicon sizes

For most websites, 16x16, 32x32, and 48x48 cover the classic favicon use cases, while 128x128 or 256x256 help with sharper displays.

Icons for websites and apps

One PNG source can become a favicon, desktop shortcut icon, or Windows app icon when you export the right size set.

Need the size recommendations? Read our favicon size guide for practical website favicon setups.

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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