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.

ICO Converter (Free, Fast & Private)

Name: ICO Converter: Professional Icon Maker for Windows and Web
Author: Pixes

Professional .ico file creator with support for multiple resolutions.

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 (e.g., desktop vs. list view). If you only have one size within your ICO, it will appear blurry when scaled up or pixelated when scaled down. Our ICO maker ensures your icons are high-quality across all devices. For web developers, this katmanlı structure also ensures compatibility across legacy browsers and modern high-resolution displays.

Why Choose Pixes.app ICO Maker?

True Multi-Resolution Support: We embed all your chosen sizes as actual layers within a single file.. Maintain sharpness at every Windows folder view scale.

100% Data Privacy: Your photos are never uploaded to our servers. Processing happens in your local browser.. Your commercial branding stays strictly confidential.

Fast and Free: No registration, no ads, no fees. Just professional-quality results in seconds.. Save time and resources with a tool designed for developers.

3 Steps to a Professional ICO File

No technical skills required. Learn how to create Windows-compatible icons using only your browser. All processing happens locally (client-side).

Upload Your Image (PNG/JPG): 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.
Select Icon Sizes: 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.
Convert to ICO and Download: 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.

Expert Tips for ICO Files

Transparency is Crucial: For icons that aren't perfect squares, use a transparent PNG to avoid a distracting white border on your icon.

The 256x256 Rule: Modern Windows and macOS versions use 256x256 icons for high-DPI displays. Include this size to keep your icons from looking pixelated on modern monitors.

32-Bit Color Depth: Our tool creates 32-bit (alpha channel) icons, allowing for smooth shadows and better anti-aliasing for a modern aesthetic.

Who Needs Our ICO Converter?

💻 Windows App Developers: When building desktop applications in .NET, C++, Python, or Java, you need a high-quality multi-size ICO for your .exe file's icon.

📁 Desktop Customizers: Want to change your folder or shortcut icons to something personalized? Convert your favorite images into icons with ease.

🌐 Web Designers and SEO Experts: Ensure your favicon looks consistent across all browser versions by providing a proper multi-size .ico file.

System Administrators: Prepare professional icon sets for cross-network software deployments or custom internal tools.

How to use this tool

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.
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.
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.

Related tools

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.