PNG → ICO

Does this PNG to ICO tool upload my images to any server?

No. The conversion is performed entirely inside your browser using JavaScript and the Canvas API. Your PNG file never leaves your device.

Why can I select multiple sizes?

The .ico format is unique because it can store multiple versions of an image in a single file. By selecting multiple sizes, you ensure your icon looks sharp on different displays (e.g., 16px for browser tabs, 64px for desktop shortcuts).

Does this tool preserve transparency?

Yes! Unlike JPG conversion, converting PNG to ICO preserves the alpha channel, so your icons will have transparent backgrounds.

What are the best sizes to select for a favicon?

For a general-purpose favicon, we recommend selecting 16px, 32px, and 48px. If you are creating a desktop icon, include 64px, 128px, and 256px as well.

Why only PNG inputs?

PNG is the standard format for source images with transparency. Using PNG ensures the highest quality input before we resize and pack it into the ICO format.

Will the image lose quality when resized?

The tool uses high-quality image smoothing algorithms when downscaling your image to smaller sizes (like 16px) to keep them as clear as possible.

Why is the output name based on the original PNG?

The tool keeps your original filename and simply replaces the .png extension with .ico to maintain consistent naming.