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ICO to AVIF Converter

Convert ICO images to AVIF right in your browser, one file or a whole batch. Transparent areas stay transparent.

  • Free, no sign-up
  • Files never leave your device
  • Batch processing
  • No watermark
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Your files are processed on this device and are never uploaded to a server.

What happens when you convert ICO to AVIF

CompressionLossless → Lossy or lossless
TransparencyKept
MetadataEXIF, GPS location and camera data are not copied to the new file
Opens inChrome, Edge, Firefox, Safari 16+ and Windows 11 with the AV1 extension; most editors and CMSs do not yet

Sizes are typical values; your files will vary with content and settings.

ICO

ICO Windows Icon

ICO is a container that holds one or more square icon images at different sizes. Browsers use it for favicon.ico and Windows uses it for application and shortcut icons.

ICO converter
AVIF

AVIF AV1 Image File Format

AVIF stores images with the AV1 video codec. It usually beats WebP on file size, handles HDR and wide colour, and supports transparency. Chrome, Firefox, Edge and Safari 16+ display it.

AVIF converter

How to use the ICO to AVIF Converter

  1. 1

    Click Choose files or drop your ICO images onto the page.

  2. 2

    Adjust the AVIF options if needed. The defaults work well for most images.

  3. 3

    Click Convert, then download each AVIF or all of them as a ZIP.

Why convert ICO to AVIF?

ICO files are Windows icons and website favicons, and one file often holds several sizes. Icons are limited to 256×256 pixels and must be square. Choose AVIF for the smallest web images, after checking that your CMS or upload target accepts it.

ICO to AVIF settings

Use the quality slider to balance size against detail; 80 to 90 percent is a good default for AVIF. You can also cap the width and height, which resizes large photos in the same step.

Frequently asked questions

Will the AVIF lose quality?

AVIF uses lossy compression, so some fine detail is discarded to make the file smaller. At the default quality setting the difference is very hard to see. Raise the quality slider if you need the result to stay closer to the ICO original.

Is transparency kept when converting ICO to AVIF?

Yes. AVIF supports transparency, so transparent areas in your ICO stay transparent.

Questions about privacy, file-size limits or conversion speed are answered in the general FAQ.