How to use PNG to ICO Converter
- Upload a PNG, preferably a square icon with clear edges.
- Choose one or more icon sizes and review the largest included preview.
- Download the ICO containing those sizes.
A closer look
An ICO is an icon container, not a PNG with a different filename. This converter writes a valid ICO directory with PNG image entries for the selected dimensions. Rectangular artwork is fitted inside a square transparent canvas without stretching. Multiple sizes help compatible software choose an appropriate representation. Older applications that require bitmap-only ICO entries may not support these modern PNG-backed icons.
A practical example
Select a square logo and include 16, 32, 48 and 256 pixel sizes. One ICO contains those image entries for software that supports PNG-backed icons.
A useful tip
Start with a square image at least as large as your biggest chosen icon size; enlarging a tiny source cannot add detail.
Good questions. Simple answers.
Which sizes can I include?
Choose 16, 32, 48, 64, 128, or 256 pixels. The ICO can contain several of them.
Can I use it as a favicon?
Modern browsers support ICO favicons. Test it in the actual app or browser where you plan to use it.
Explore all image tools for related tasks and category-specific guidance, or read how Toolzafi handles your data.