File Utils

BlogImage converter

Best image to icon converter

Convert PNG, JPG, WebP, SVG, or any image to ICO format instantly in your browser. Create multi-size favicons (16x16, 32x32, 48x48, 64x64), Windows app icons, and .ico files - no upload, no software needed.

What is an ICO file?

An ICO file (.ico) is a container format that stores one or more images at different resolutions inside a single file. Browsers, operating systems, and apps pick the most suitable size automatically: a 16x16 pixel version for browser tabs, 32x32 for taskbars, 48x48 for desktop shortcuts, and so on.

ICO is the standard format for:

  • Browser favicons: the tiny icon shown in tabs, bookmarks, and address bars
  • Windows executable icons: the icon attached to .exe and .dll files
  • Desktop shortcut icons
  • Progressive Web App (PWA) icons
  • Windows taskbar and Start menu icons

Why you need an ICO converter

Most design tools export PNG, SVG, WebP, or JPEG. Browsers technically accept PNG favicons via <link rel="icon" type="image/png">, but ICO remains the most universally supported format. This is especially true for legacy browsers, Windows File Explorer thumbnails, and favicon.ico auto-discovery. Browsers automatically request /favicon.ico even without a <link> tag.

How to convert an image to ICO online

  1. Open Image to ICO. No account or download needed.
  2. Drag and drop your source image (PNG, JPG, WebP, SVG, GIF, BMP, or TIFF) onto the drop zone, or click to browse.
  3. The converter processes your image entirely in the browser. Nothing is sent to any server.
  4. Download the .ico file. Place it at the root of your website as favicon.ico, or reference it with a <link> tag.

What image formats can I convert to ICO?

Input formatNotes
PNGBest source: lossless, supports transparency
SVGVector is rasterized to a canvas before encoding
WebPSupported in modern browsers
JPG / JPEGNo transparency; white background assumed
GIFAnimated frames are not preserved in ICO
BMPLossless, large file
TIFFLossless, primarily for print

Tip: Always start from a PNG or SVG source with a transparent background. This gives you the cleanest result at small sizes, especially 16x16 where every pixel matters.

ICO file sizes and resolutions explained

SizeUse case
16x16 pxBrowser tab, bookmarks bar
32x32 pxWindows taskbar, shortcut icon
48x48 pxWindows Explorer thumbnails
64x64 pxHigh-DPI displays, larger shortcuts
128x128 pxmacOS dock, Windows 10 Start menu tiles
256x256 pxHigh-res display, large icon view

A modern favicon.ico typically bundles 16, 32, and 48 px layers. For full Windows application support, embedding 16 through 256 px is recommended.

favicon.ico vs PNG favicon vs SVG favicon

Modern browsers support multiple favicon types. Here is when to use each:

TypeBrowser supportTransparencyScalableRecommended for
favicon.icoAll browsers incl. IEYes (32-bit)NoUniversal fallback, all projects
favicon.png (32px)Chrome, Firefox, SafariYesNoModern browsers only
favicon.svgChrome 80+, Firefox 41+YesYesModern only, color-scheme aware
Apple touch icon (180px PNG)Safari iOS/macOSYesNoAdd to Home Screen on iOS

Best practice: provide all three. Use ICO as a fallback, a 32px PNG for modern browsers, and an SVG for color-scheme-aware icons.

<link rel="icon" href="/favicon.ico" sizes="any">
<link rel="icon" href="/favicon.svg" type="image/svg+xml">
<link rel="apple-touch-icon" href="/apple-touch-icon.png">
<link rel="manifest" href="/site.webmanifest">

Common favicon mistakes to avoid

  • Using a JPEG source. JPG has no transparency, so sharp icon edges get a white or colored halo at small sizes.
  • Too much detail at 16x16. Complex logos collapse into noise. Simplify or use a lettermark.
  • Forgetting the root favicon.ico. Browsers request it automatically. A 404 wastes a network round trip.
  • Skipping the Apple touch icon. iOS Safari ignores favicon.ico. You need a separate 180x180 PNG.
  • Using only one ICO size. Windows and browsers scale images, often with poor results. Embed multiple sizes.

How to use your ICO file

For websites

Place favicon.ico at the root of your domain (e.g., https://example.com/favicon.ico). Then add to <head>:

<link rel="icon" href="/favicon.ico" sizes="16x16 32x32 48x48" type="image/x-icon">

For Next.js apps

Drop favicon.ico into the /app directory. Next.js automatically serves it and adds the correct <link> tag.

For Windows applications

Embed the .ico in your project resources. Visual Studio and most C++/C# IDEs accept .ico directly.

For Electron apps

Reference the icon path in BrowserWindow options:

new BrowserWindow({ icon: path.join(__dirname, 'icon.ico') });

ICO vs other icon formats

FormatWindowsmacOSLinuxWebSize
ICONativeLimitedLimitedFaviconSmall
PNGYesYesYesYesMedium
ICNSNoNativeNoNoMedium
SVGNoNoYesModern onlyTiny

For cross-platform desktop apps, use PNG or platform-specific formats alongside ICO.

Frequently asked questions

Can I convert a logo to a favicon?

Yes. Export your logo from Figma, Illustrator, or Photoshop as a PNG with a transparent background, then use the Image to ICO converter. For best results at 16x16, simplify your logo to its core mark or a single letter.

Is my image uploaded when I convert?

No. The entire conversion runs client-side in your browser tab using the Canvas API. Your files never leave your device.

Will the ICO work on all browsers?

ICO is the most universally supported favicon format. It works in Chrome, Firefox, Edge, Safari, Opera, and Internet Explorer 6+.

How do I check if my favicon is working?

Open DevTools, go to the Network tab, filter for favicon, and reload the page. Some browsers cache the old favicon. Try a hard reload (Ctrl+Shift+R or Cmd+Shift+R).

Can I convert an animated GIF to ICO?

ICO does not support animation. The converter uses the first frame of a GIF. For animated favicons, use an animated WebP or APNG with the <link rel="icon"> tag.

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