PNG to ICO Converter

Create a favicon or Windows icon from any PNG. Choose the sizes you need — 16×16 up to 256×256 — and get a single multi-size .ico file in seconds.

No upload Multi-size .ico Keeps transparency Free

Drop your PNG image here

or click to browse · you can also paste an image (Ctrl/⌘ + V)

Choose PNG File

    Your files are processed on your device and never uploaded.

    How to Convert PNG to ICO

    1. Add a PNG image, ideally a square logo at least 256×256 px with a transparent background.
    2. Select the icon sizes to include. 16, 32, 48 and 256 px are selected by default and cover almost every use.
    3. Click Create to build one .ico file that contains every size, then download it.

    Which ICO Sizes Do You Need?

    SizeUsed for
    16×16Browser tab favicon
    32×32Retina browser tabs, Windows taskbar
    48×48Windows desktop and file explorer
    64 / 128Larger shortcuts and app listings
    256×256Windows high-DPI icons

    How to Add a Favicon to Your Website

    Rename the downloaded file to favicon.ico, upload it to the root of your website, and add this line inside your page's <head>:

    <link rel="icon" href="/favicon.ico" sizes="any">

    Browsers automatically pick the best size from the file.

    Tips for a Crisp Icon

    • Start square: non-square images are centered with transparent padding.
    • Keep it simple: fine details disappear at 16×16. A bold symbol or one letter works best.
    • Use transparency so the icon looks good on light and dark browser themes, or set a background color if you prefer a solid tile.

    Tip: Have an SVG logo? Convert it with our SVG converter to a 4× PNG first for the sharpest icon.

    Private and Free

    The .ico file is built inside your browser, and your logo never leaves your device. There's no signup or watermark.

    Works on Every Device

    The PNG to ICO Converter runs in any modern browser: Chrome, Safari, Edge and Firefox on Windows, Mac, Chromebook, iPhone, iPad and Android. Because everything happens on your device, it's fast even on slow connections and keeps working if your internet drops after the page loads. There are no file-size caps set by a server, and no account, email address or watermark is required.

    Troubleshooting & Tips

    • The icon looks blurry at 16×16 Small sizes can't show fine detail. Use a simplified, bold version of your logo for the best favicon.
    • My icon has white corners Leave Background set to Transparent so the icon blends with any browser theme.
    • The favicon doesn't update on my site Browsers cache favicons aggressively. Hard-refresh (Ctrl/⌘ + Shift + R) or open the site in a private window.
    • The image isn't square Non-square images are centered on a transparent square canvas, so nothing gets stretched.

    Frequently Asked Questions

    How do I convert a PNG to ICO?

    Add your PNG above, choose the icon sizes and click Create. Download the .ico file.

    What size should a favicon be?

    Include at least 16×16, 32×32 and 48×48. Adding 256×256 covers high-DPI Windows icons.

    Does the ICO keep transparency?

    Yes. Transparent areas in your PNG stay transparent in every icon size.

    Can one ICO file contain multiple sizes?

    Yes. K4Converter packs every size you select into a single .ico file.

    Can I use the ICO as a Windows folder or shortcut icon?

    Yes. The file works as a standard Windows icon.

    Written by Prakhar Singh, software engineer and creator of K4Converter · Last updated October 2026