Convert PNG to ICO Online Free

Convert PNG images into ICO format for website favicons and Windows application icons. Creates a proper .ico file with embedded sizes for crisp display at every dimension.

By ChangeThisFile Team · Last updated: March 2026

Quick Answer

To convert PNG to ICO, drop your PNG image into the converter. ChangeThisFile creates a proper .ico file containing your image at multiple sizes (16x16, 32x32, 48x48) for crisp display as a favicon or application icon. The conversion runs in your browser with no upload required.

Free No signup required Files stay on your device Instant conversion Updated March 2026

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PNG vs ICO: Format Comparison

Key differences between the two formats

Feature	PNG	ICO
Purpose	General-purpose image	Icons and favicons
Sizes	Single size	Multiple sizes in one file
Transparency	Full alpha	Full alpha
Use as favicon	Modern browsers only	All browsers
Windows icons	Not supported	Native format
Typical sizes	Any	16, 32, 48, 256 pixels
Best for	Web images, graphics	Favicons, app icons

When to Convert

Common scenarios where this conversion is useful

Creating website favicons

The favicon.ico file is still the most reliable way to add a site icon that works in every browser, including very old ones. Convert your logo PNG to ICO for universal favicon support.

Windows application icons

Windows executables and shortcuts require ICO format for their icons. Convert your app logo PNG to ICO to use it as an application icon.

Browser tab icons

While modern browsers support PNG favicons, ICO provides the widest compatibility. A properly generated ICO contains multiple sizes for sharp rendering at any browser zoom level.

Desktop shortcut icons

Creating desktop shortcuts or custom folder icons on Windows requires ICO format. Convert your custom icon design from PNG to ICO.

Who Uses This Conversion

Tailored guidance for different workflows

Designers

Convert PNG mockups to ICO for sharing with clients who need a universally compatible format
Transform PNG design assets to ICO for embedding in presentations or documents

Check the converted ICO at full zoom to verify no visible artifacts in gradients or fine details

Keep the original PNG as your master copy in case you need to re-export later

Web Developers

Convert PNG images to ICO for optimized loading on websites and web applications
Transform PNG assets to ICO for cross-browser compatibility in production builds

Test the converted ICO file in both Chrome and Safari to ensure consistent rendering

Consider the file size difference between PNG and ICO when optimizing page load speed

Photographers

Convert PNG photos to ICO for uploading to stock photography platforms or portfolios
Batch convert PNG images to ICO for delivering client galleries in a widely supported format

Use the highest quality setting when converting to ICO to preserve fine detail in your photos

Verify color accuracy after conversion, as PNG and ICO may handle color profiles differently

How to Convert PNG to ICO

1

Upload your PNG image

Drag and drop your PNG logo or icon into the converter, or click browse. Best results with square images at 256x256 or larger.
2

Multi-size ICO generated

The converter resizes your PNG to standard icon sizes (16x16, 32x32, 48x48) and packages them into a single .ico file with transparency preserved.
3

Download the ICO file

Save the .ico file. Use it as favicon.ico on your website, or as a Windows application/shortcut icon.

Frequently Asked Questions

What sizes are included in the ICO file?

The converter generates 16x16, 32x32, and 48x48 pixel versions of your image, all packed into a single .ico file. These cover the most common display sizes for favicons and desktop icons.

What's the best source PNG size for conversion?

A square PNG of 256x256 pixels or larger gives the best results. The converter will resize it to the needed dimensions. Non-square images will be fitted with preserved aspect ratio.

Is transparency preserved in the ICO?

Yes. PNG alpha transparency is preserved in the ICO file. Your icon will have proper transparent areas that blend seamlessly with any background.

How do I use the ICO as a favicon?

Save the file as favicon.ico and place it in your website's root directory. Browsers will find it automatically. You can also link to it explicitly with: <link rel='icon' href='/favicon.ico'>

Should I use ICO or PNG for my favicon?

For maximum compatibility, use ICO. While modern browsers accept PNG favicons, Internet Explorer and some edge cases still require ICO. Many sites provide both: an ICO fallback and PNG for modern browsers.

Can I convert a non-square PNG to ICO?

Yes, but square images work best for icons. Non-square images will be fitted into the square icon frame with the aspect ratio preserved and transparent padding added.

Does this work for Windows .exe icons?

The generated ICO file can be used as an application icon, but embedding it in an .exe file requires a resource editor or build tool like Visual Studio.

Is there a file size limit?

No. The converter processes the PNG in your browser with no size restrictions. However, for icons, starting with a clean 256x256 or 512x512 PNG produces the best results.

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Need to convert programmatically?

Use the ChangeThisFile API to convert PNG to ICO in your app. No rate limits, up to 500MB files, simple REST endpoint.

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Read our guides on file formats and conversion

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