BYTETOOLS

ICO Converter (Favicon Generator)

Convert PNG or JPG images to a multi-size ICO favicon (16, 32 and 48 px in one file). Generate a valid favicon.ico in your browser — free, no uploads.

Drop a square PNG or JPG logo here256×256 or larger recommended. Built locally — never uploaded.

What is the ICO Converter (Favicon Generator)?

This tool converts any PNG or JPG image into a proper multi-resolution . ico file containing 16×16, 32×32 and 48×48 pixel versions — the standard favicon sizes browsers and Windows expect.

  • Generates a true multi-image ICO (16 + 32 + 48 px)
  • PNG-in-ICO encoding — modern, compact and valid
  • Preview every embedded size before downloading
  • Transparency preserved from PNG sources
  • Works for website favicons and Windows app icons
  • Built entirely in your browser — no upload

How to use the ICO Converter (Favicon Generator)

  1. 1

    Upload a square PNG or JPG logo (256×256 or larger works best).

  2. 2

    The tool renders it at 16, 32 and 48 pixels and shows a preview of each size.

  3. 3

    Check that the small sizes are still recognizable.

  4. 4

    Click Download favicon.ico and drop the file in your website's root folder.

About the ICO Converter (Favicon Generator)

This tool converts any PNG or JPG image into a proper multi-resolution .ico file containing 16×16, 32×32 and 48×48 pixel versions — the standard favicon sizes browsers and Windows expect. Upload a square logo, preview each size, and download a ready-to-use favicon.ico.

A real ICO file bundles several sizes so every context gets a crisp icon: 16 px for browser tabs, 32 px for taskbars and bookmarks, 48 px for desktop shortcuts. Renaming a PNG to .ico doesn't achieve this — this tool builds the genuine ICO container format.

The entire file is assembled in your browser: your logo is drawn at each size on a canvas and packed into a valid ICO structure locally. Nothing is uploaded, and the result works in every browser and on Windows.

Frequently asked questions

How do I create a favicon.ico for my website?

Upload a square logo here, download the generated favicon.ico, and place it in your site's root directory (yoursite.com/favicon.ico). Optionally add a link rel="icon" tag to your HTML head — browsers will pick it up automatically.

What sizes should a favicon.ico contain?

The standard set is 16×16 (browser tab), 32×32 (bookmarks, taskbar) and 48×48 (desktop shortcuts) — exactly what this tool embeds. Larger sizes like 180 px for Apple touch icons are served as separate PNG files, not inside the ICO.

Can I just rename a PNG file to favicon.ico?

Modern browsers are forgiving and often display it, but Windows and older software will reject it because ICO is a container format with its own header. This tool builds a genuine ICO structure, so the file is valid everywhere.

Does the ICO file keep transparency?

Yes — the tool embeds PNG-encoded images inside the ICO container, which preserves full alpha transparency. Your icon's rounded corners and cut-out background stay clean on any tab or desktop background.

What image should I start with for the best favicon?

Use a square image at least 256×256 with a simple, bold design — intricate detail vanishes at 16 pixels. Test the 16 px preview: if you can't recognize the logo there, simplify it before generating the icon.

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