AVIF to ICO Converter

You have a logo or picture saved as AVIF and you need a Windows icon or a website favicon. Those want an ICO file, which holds the same image at several sizes. This page builds the ICO from your AVIF directly in the browser tab, lets you choose the sizes, and never uploads your file.

Drop images here, click to choose, or paste with Ctrl+V
AVIF files · many files at once · nothing is uploaded

How to convert AVIF to ICO

  1. Add your AVIF files by dropping them, clicking the drop zone or pasting.
  2. The output format is already set to ICO. Adjust quality or size if you need to.
  3. Press Convert and compare the original and new size for each file.
  4. Download each file or all of them as a ZIP.

When to convert, and when not to

  • You are making a favicon or a desktop shortcut icon from an AVIF logo.
  • A program asks for an .ico file and rejects other image types.
  • You want one file that contains several icon sizes.
  • Do not convert a wide photograph or a detailed picture and expect it to read well. Icons are tiny, so a simple, square design works best.

What changes

  • The ICO contains one PNG-compressed image for each size you tick, from 16 up to 256 pixels. The default is 16, 32 and 48.
  • Your picture is fitted inside a square without being stretched, so a wide image gets empty space above and below.
  • Transparency is kept in the icon.
  • Your browser must be able to open AVIF to read the source.
  • Animation and metadata are not carried over.

Why an icon holds several sizes

An ICO file is a small container. Instead of one picture it can hold a set, and the program that displays the icon picks the size that fits: a tiny version for a browser tab, a larger one for a desktop shortcut or a file list.

In the options panel you tick the sizes to include. Fewer sizes make a smaller file, and more sizes make the icon look sharper in more places.

Windows and browsers pick the entry that best matches the space they have, so including a few sizes avoids ugly scaling. If you only tick one size, programs have to enlarge or shrink it themselves.

Preparing your AVIF so the icon looks good

Icons are shown at very small sizes, where fine detail disappears. A simple shape on a plain or transparent background survives that shrinking. A full scene or a long line of text does not.

If the AVIF is not square, the converter fits the whole picture inside the square and leaves the rest empty. Crop the image to a square first in an editor when you want it to fill the space.

A logo that already sits in the middle of a square canvas with some margin gives the neatest result. Margins stop the artwork from touching the edge of the icon.

Using the result as a favicon

For a website, the usual approach is to name the file favicon.ico and place it where your site expects it, then link it in the page head if needed. Many sites also provide PNG versions for other uses.

After converting, download the file and test it in a browser tab on your own device. The look at 16 pixels is the one to check most carefully.

Keep the AVIF master. If you later redesign the icon, you can build a fresh ICO from the master instead of editing the old icon file.

Test the icon in the place it will be used: a browser tab for a favicon, or a shortcut on the desktop. Browsers cache icons, so you may need to clear the cache or open a private window to see a new one.

Privacy: your files stay on your device

  • The tool decodes, resizes and encodes your pictures with your browser. The files are never sent to a server.
  • To check it yourself: open the browser developer tools (F12), open the Network tab, convert a file, and look for any request that carries your image. You will see none.

Frequently asked questions

Which sizes should I choose?

The default of 16, 32 and 48 pixels covers common favicon and shortcut uses. Add larger sizes if a program asks for them.

Will a wide AVIF be stretched?

No. It is fitted inside the square with its proportions kept.

Is transparency preserved?

Yes, transparent areas stay transparent in the icon.

Can I select a size above 256 pixels?

No. The ICO format used here holds sizes from 16 up to 256 pixels.

Is my image sent to a server?

No. The icon is built in your browser tab.

Can I use the ICO as a favicon?

Yes. Name it favicon.ico and place it where your site expects it, then test it in a browser tab.

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