PNG to ICO Converter

About the PNG to ICO Converter

This PNG to ICO converter turns PNG images into multi-resolution ICO files suitable for website favicons. Select the icon sizes you need — from 16px to 256px — and the converter bundles them into a single ICO file. No files are uploaded to any server; the entire conversion runs in your browser.

Why Use ICO for Favicons?

The ICO format stores multiple image sizes inside one file. When a browser needs a favicon, it picks the size that best matches the display context — 16px for the tab bar, 32px for bookmarks, 48px for Windows shortcuts, and larger sizes for high-DPI displays. A single ICO file covers all these cases without extra markup or multiple files.

• Multi-resolution packaging — One file contains every size the browser or operating system might request.
• Universal browser support — Every major browser recognizes the ICO format for favicons, including legacy versions of Internet Explorer.
• Simple deployment — Drop a single favicon.ico file in your site root. Most web servers and browsers find it automatically.

How Does PNG to ICO Conversion Work?

The converter reads your PNG file, scales it to each selected size using an HTML Canvas element, and packs all the scaled images into the ICO binary format. The ICO file uses PNG compression internally, so there is no quality loss beyond the scaling step. The entire process runs in your browser using standard web APIs.

How to Create a Favicon from a PNG Image

1. Drag a PNG file into the drop zone, or click to browse.
2. Select the icon sizes you need. All sizes (16, 32, 48, 64, 128, 256) are checked by default.
3. Click Convert All to generate the ICO file.
4. Download the ICO file and place it in your website root directory.

Which Icon Sizes Should You Include?

The ideal set depends on your audience, but these guidelines cover most situations:

• 16px — Browser tab favicons and bookmark bar icons. Always include this size.
• 32px — Used by most modern browsers as the primary favicon. Always include this size.
• 48px — Windows desktop shortcuts and taskbar pins. Important if your site targets Windows users.
• 64px — Some browsers and RSS readers use this size for larger icon displays.
• 128px — Chrome Web Store and some high-DPI displays use this size.
• 256px — Windows Vista and later use this size for large icon views. Include it for the sharpest display on modern systems.

Best Practices for Favicon Creation

• Start with a square PNG image of at least 256px. Scaling down from a large source produces sharper results than scaling up from a small one.
• Keep the design simple. Favicons display at very small sizes — fine details and text become unreadable below 32px.
• Use a transparent background if your logo works on different colored surfaces. The ICO format preserves PNG transparency.
• At minimum, include 16px, 32px, and 48px. These three sizes cover the vast majority of browser and operating system use cases.
• Name the file favicon.ico and place it at the root of your website. Most browsers look for this path automatically.

Frequently Asked Questions

Is my data safe when converting PNG to ICO?

All conversion runs locally in your browser. Your files never leave your device and no data is transmitted to any server.

What is the best source image size for creating a favicon?

Use a square PNG of at least 256px on each side. The converter scales it down to each selected size. Starting from a larger image ensures the sharpest results at every resolution.

Can I include only specific sizes in the ICO file?

Yes. Uncheck the sizes you do not need before converting. The ICO file will contain only the selected sizes, reducing the overall file size.

Does the ICO format support transparency?

Yes. ICO files use PNG compression internally, which preserves alpha channel transparency. If your source PNG has a transparent background, the favicon will too.

Where should I place the favicon.ico file on my website?

Place it at the root of your domain (e.g., https://example.com/favicon.ico). Most browsers check this path automatically. You can also specify the location with a <link rel="icon"> tag in your HTML head.

Related Tools

You might also find these tools useful:

• Image Converter — convert between all supported image formats
• Image Resizer — resize images to specific dimensions before creating a favicon
• Image Compressor — reduce file sizes without changing formats