Zelio

Convert PNG to ICO

Turn a PNG into a multi-resolution ICO file ready to use as a favicon. The output packs 16×16, 32×32, and 48×48 pixel versions into a single .ico, with transparency carried over from your PNG.

Favicon for any website

Save the output as favicon.ico at your site root. Every browser picks it up automatically, no link tag required.

Best source format

PNG is the ideal source for icons. It is lossless, supports transparency, and is what most designers export to from Figma, Sketch, or Affinity.

Multi-resolution in one file

Browsers request different sizes for tabs, bookmarks, and shortcuts. A single .ico with 16, 32, and 48 covers all common cases.

Transparency carries over

The alpha channel from your PNG is preserved in every embedded size, so the icon looks clean on any background.

How it works

  1. 1Drop your PNG fileSquare sources work best. If your PNG is not square, the output is centered and padded with transparent pixels.
  2. 2Click convertWe resize your PNG to 16, 32, and 48 pixel versions and pack them into a single ICO. No options to choose.
  3. 3Save as favicon.icoRename to favicon.ico and place at your site root. Or drop it into a Windows app project as the EXE icon.

FAQ

What size should my source PNG be?

At least 48×48 pixels. Ideally 256×256 or larger and square. Larger sources downscale cleanly to icon sizes.

What if my PNG is not square?

We center it and pad with transparency so the icon canvas is square. If you want full control over framing, crop the PNG to a square in an image editor first.

Do I need both favicon.ico and PNG favicons?

For modern browsers, a single favicon.ico at the root is enough. If you want maximum control across Apple devices, add PNG icons with link rel='apple-touch-icon' too.

Will small sizes look fuzzy?

Detail is naturally limited at 16×16, but our resizer uses high-quality smoothing. For best small-size results, design with thicker strokes and bolder shapes in mind.

Is the ICO file standard?

Yes. The output uses the modern PNG-in-ICO format that every browser (Chrome, Firefox, Edge, Safari) and Windows supports. The file is fully spec-compliant.