ICO Converter

Convert PNG/JPG to ICO and ICO to PNG with multiple sizes.

Mode

Image → ICOICO → Image

Drag & drop files here, or click to select

Your file never leaves your device · No signup · No daily limit

Up to 100 MB per file

All processing happens locally in your browser. Files are never uploaded.

How it works

Drop a PNG or JPG (or an ICO to convert back).
Choose the icon sizes to include.
Convert to a multi-size ICO, or extract PNGs from an ICO.
Download the result.

What people use it for

Making a favicon.ico with multiple sizes from a PNG.
Creating a Windows app icon.
Extracting the images out of an existing ICO.

Good to know

ICO is best for square source images; non-square inputs are fitted and may need pre-cropping.
Very small icon sizes lose fine detail, design simple shapes for 16×16.

Frequently asked questions

Why does an ICO have multiple sizes?

Windows and browsers pick the best size for the context (taskbar, tab, desktop). A multi-size ICO stays crisp everywhere, which this tool builds in one file.

Can I go from ICO back to PNG?

Yes, drop an ICO and extract the embedded images as PNGs.

Is my image uploaded?

No. Conversion runs entirely in your browser.

Related tools

Favicon Generator