Convert PNG to ICO Online — Create Favicons Instantly

Turn any PNG into a multi-size ICO favicon file.

How It Works

  1. 1Upload your file by dragging it into the drop zone or clicking to browse.
  2. 2Adjust the quality slider to balance file size and visual fidelity (optional).
  3. 3Click Download to save your converted file.

About PNG to ICO

ICO files are the standard format for website favicons — the small icon shown in browser tabs. This tool converts your PNG image into a proper ICO file containing multiple sizes (16×16, 32×32, and 48×48) packed into a single file. The ICO format is understood by all browsers and is required for compatibility with older browsers and some platforms. Everything runs in your browser.

Frequently Asked Questions

What is an ICO file?

ICO (Icon) is a file format that contains one or more images at multiple sizes and color depths. It's the standard format for website favicons (the small icon in browser tabs) and Windows desktop icons.

Is my file uploaded to a server?

No. Transmute processes everything locally in your browser using JavaScript and the Canvas API. Your files never leave your device — there is no server, no upload, no cloud processing.

What sizes are included in the ICO file?

The generated ICO file contains three sizes: 16×16 (browser tab), 32×32 (browser tab on high-DPI), and 48×48 (Windows shortcut). These cover all standard favicon use cases.

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