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🖼️ PNG → ICO

PNG to ICO Converter

Convert any PNG image to a multi-size .ico favicon file instantly. Supports transparency. 10 sizes from 16×16 to 512×512 packed into one file.

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Why PNG is ideal for favicon source images

PNG is the best format for creating favicons because it supports full alpha transparency. This means your icon background can be fully transparent, allowing it to adapt perfectly to dark-mode tabs, light browsers, and custom browser themes — without a visible background rectangle.

How PNG to ICO conversion works

Our tool loads your PNG using the browser's File API, draws it onto HTML5 Canvas elements at each of the 10 required sizes, then encodes the pixel data into standards-compliant ICO binary format. Sizes below 256px are stored as 32bpp BMP DIBs (preserving transparency through the alpha channel); sizes 256px and above are embedded as PNG streams — the approach used by Windows Vista+ and modern browsers.

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Frequently Asked Questions

The ICO file includes 16×16, 32×32, 48×48, 64×64, 128×128, and 256×256 pixel versions, all embedded in one multi-resolution .ico container. Windows and browsers pick the most appropriate size automatically.
Different contexts render favicons at different sizes: browser tabs use 16×16, Windows taskbar uses 32×32, high-DPI displays use 64×64 or higher. A multi-resolution ICO ensures sharpness at every size without separate files.
Use a PNG of at least 256×256 pixels, ideally 512×512 or 1024×1024. The tool scales down to generate smaller sizes — starting large preserves detail. Square images work best.
Yes. Transparent areas in your PNG are preserved in the ICO. This is important for favicons that appear on both light and dark browser chrome — a transparent favicon adapts to both.
Yes. Upload any JPG, PNG, WEBP, or other image. The tool converts it to ICO internally. For best results with transparency, use a PNG input.
Yes. ICO is the universally supported favicon format. It works in Chrome, Firefox, Safari, Edge, and Internet Explorer. All modern browsers read multi-resolution ICO files and select the appropriate size.

How to add a favicon to your website

1
Convert your logo PNG to ICO using this tool — download favicon.ico.
2
Upload favicon.ico to your website root directory (same folder as index.html).
3
Add to your HTML <head>: <link rel="icon" href="/favicon.ico" sizes="any">
4
Optionally add a modern SVG favicon and Apple touch icon for full cross-platform support.

Convert PNG to ICO – The Best Way to Create a Transparent Favicon

PNG is the ideal source format for favicon creation because PNG supports full transparency (alpha channel). When you convert a PNG logo with a transparent background to ICO, the resulting favicon has a transparent background that adapts correctly to both light and dark browser themes. A JPG-to-ICO conversion forces a white or black background into your favicon, which looks incorrect in dark-mode browsers or on dark-colored browser tabs.

This browser-based PNG-to-ICO converter generates a multi-size ICO file containing 16×16, 32×32, and 48×48px variants — all embedded in a single .ico file. This is the standard structure expected by browsers and operating systems. Drop in your transparent PNG logo, generate the ICO, and place it as favicon.ico in your website's root directory. All processing is client-side — your logo never leaves your browser.

  • Ideal input — Square transparent PNG, 512×512px or larger, with logo centered with padding
  • Transparency preserved — ICO format supports alpha transparency; your transparent background carries through
  • After converting — Place `favicon.ico` at your site root; add `<link rel="icon" href="/favicon.ico">` to your `<head>`

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