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AVIF to ICO converter

Convert AVIF to ICO in your browser. No upload and no account: the file never leaves your device, so the only size limit is your device’s memory.

I want ICO
90%
Icon sizes
How to make the SVG

Tracing suits logos, icons and flat artwork and scales cleanly. Photos are better kept as pixels inside the SVG.

16
50%
Dither Scatters black dots to suggest gray, instead of a hard cut-off.
Advanced 5
Keep the animation For animated GIF, WebP and APNG sources. Turn off to save just the first frame.
Rotate
Mirror horizontally
Mirror vertically

For an exact width and height, use the Resize Image tool instead.

Bytes of your files sent anywhere: 0 B

Related conversions

Need it the other way round? Convert ICO to AVIF

Other ways to convert AVIF

Convert other formats to ICO

Read more about the AVIF format and the ICO format, or see every image tool and all image conversions.

Should you convert AVIF to ICO?

Yes, if you need a favicon or a Windows icon. Start from a square AVIF of at least 256 pixels, with a transparent background if it has one, so every size inside the ICO comes out crisp.

ICO is also the more widely supported of the two: it opens almost everywhere, while AVIF is opens in current browsers and apps.

AVIF is a modern image format that squeezes photos smaller than WebP; ICO is a small container that holds the same icon at several sizes. Use ICO for a favicon.ico at the root of a website, or an icon for a Windows program or shortcut.

AVIF and ICO compared
Property AVIF ICO
Compression Lossy or lossless Lossless
Transparency Yes Yes
Animation Yes No
Support Opens in current browsers and apps Opens almost everywhere
Best for The smallest possible photos on a modern website Website favicons and Windows shortcuts
Introduced 2019 1985

How to convert AVIF to ICO

  1. 01

    Add your AVIF

    Drop your AVIF image onto the box, or click to choose it. It is read from your disk and stays there.

  2. 02

    Check the settings

    The output is already set to ICO. Change the quality if you want to; the defaults suit most files.

  3. 03

    Save the ICO

    Press convert and save the ICO. Several files come back together as a ZIP.

What changes when AVIF becomes ICO

Transparency is kept

AVIF and ICO both support transparency, so transparent backgrounds and soft edges come through unchanged.

Animations become a still

ICO can’t move, so an animated AVIF is saved as its first frame. Choose GIF or APNG instead to keep the animation.

One ICO, every size

The ICO holds 16, 24, 32, 48, 64, 128 and 256 pixel versions, each scaled from your AVIF and centered on a transparent square. Browsers and Windows pick the size they need.

Expect a much larger file

ICO is far bigger for the same content. Choose it because something needs ICO, not to send or store the file. AVIF: Often around half the size of the equivalent JPG. ICO: A full favicon with every size is usually under 100 KB.

This page is put together from our notes on each format, choosing only what is true of AVIF and ICO, so every pairing states the same facts the same way. How these pages are made.

Why it doesn’t upload

Changing a picture’s format is work your browser already knows how to do. Sending your photos to a server first only adds waiting and risk, so nothing is sent.

How to check for yourself

Worth knowing

  • About the AVIF. AVIF’s savings are real, but encoding is slow, so a batch that takes seconds as JPG can take minutes as AVIF.
  • About the ICO. Renaming a PNG to favicon.ico works in some browsers and silently fails in others. A real ICO holds several sizes so each place picks the right one.
  • DDS, PSD, EXR, XWD and JPEG 2000 are read by the FFmpeg engine, a one-time 31 MB download.

Questions

Will converting AVIF to ICO lose quality?

No. AVIF and ICO are both lossless, so every pixel is kept.

Will the ICO be smaller than the AVIF?

Expect a much larger file. ICO is far bigger for the same content. Choose it because something needs ICO, not to send or store the file. AVIF: Often around half the size of the equivalent JPG. ICO: A full favicon with every size is usually under 100 KB.

Read more about this

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