ICO Converter: Convert PNG or JPG to Windows Icons (.ico)

Generate custom Windows icon files with support for various resolutions in a single click.

Privacy first

  • Files never leave your browser
  • No server upload
  • Processed locally on your device

What is an ICO File and Why Is Multi-Resolution Support Crucial?

The ICO format was originally developed for Microsoft Windows. Its standout feature is its ability to act as a container. Within a single .ico file, multiple versions of the same graphic can coexist—typically 16x16 (small icon), 32x32 (standard icon), and 256x256 (large icon). Windows automatically chooses the most appropriate size based on where it's being displayed. This multi-layered structure ensures sharpness at every scale.

3 Steps to a Professional ICO File

No technical skills required. Create high-quality Windows-compatible icons using only your browser in seconds.

  1. Upload Your Image (PNG/JPG): Use high-resolution PNG for the best transparency results.
  2. Select Icon Sizes: Choose every resolution you want embedded within the .ico file.
  3. Convert to ICO and Download: Instantly get your file with every size embedded in its container.

Why Pixes.app?

We embed all your chosen sizes as actual layers within a single file. Maintain sharpness at every Windows folder view scale. Your photos are never uploaded to our servers. Processing happens in your local browser. Free, professional-quality results in seconds. Save time and resources with a tool designed specifically for developers. Microsoft Windows and web standards compliant.

How to use this tool

  1. Choose the image you want to convert into an icon. For best results, use a high-resolution, transparent PNG (at least 256x256). Click 'Select Image' to start.
  2. Decide which resolutions you want embedded in your .ico file. Standard sets usually include 16, 32, 48, and 256 pixels for broad compatibility. Our tool scale your icons proportionally.
  3. Once you've made your choices, click 'Download ICO.' Our tool embeds every size into a single .ico container instantly and saves it to your computer.

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FAQ

What's the best size for a website favicon?
A set including 16x16, 32x32, and 48x48 is typically optimal for all web use cases.
Why is my icon blurry after conversion?
Starting with a small master image is the most common cause. Start with a 256x256 or larger image for the best quality.
How many images can go into one .ico file?
Technically dozens, but for standard compatibility, four or five resolutions (16, 32, 48, 64, 256) are perfectly sufficient.
Which formats can I convert into an icon?
You can use PNG, JPG, and WebP. For the best quality with transparency, PNG is recommended.