AVIF to ICO Converter

If the only copy of your logo is an .avif file, this page turns it into a favicon.ico that holds every common icon size from 16 to 256 px, with the transparent background preserved.

or drop JPG, JPEG, JPE … files here ·

Max 95 MB per file· Up to 20 files· Deleted after 30 minutes

Output

Convert to

Files are processed on our servers and deleted after 30 minutes.

How to use this tool

1
Upload the AVIF logo
Use the largest square version you have; 512 × 512 px or more gives the cleanest small sizes. Several logos can go in one batch.
2
Leave icon sizes on All
Icon sizes is set to All sizes (16–256), so one .ico covers browser tabs, bookmarks and Windows shortcuts. Pick a single size only if a program asks for one.
3
Convert to ICO
Press Convert to ICO, rename the download to favicon.ico if needed and place it at the root of your site.

AVIF is a format for delivering pictures quickly; ICO is a container for small icons. Converting decodes the AVIF once and writes several downscaled copies of it into a single .ico, each with its own alpha channel.

Why an AVIF logo needs an ICO version

AVIF was released by the Alliance for Open Media in 2019 and is built on the AV1 video codec. Chrome added support in version 85, Firefox in 93 and Safari in 16, so site builders and image CDNs now hand out AVIF by default. That is how many teams end up with a brand mark saved only as logo.avif.

The favicon is the one place where that does not work well. Windows desktop shortcuts and pinned sites read ICO, older browsers and many crawlers fetch /favicon.ico without looking at your HTML, and some CMS favicon fields refuse AVIF uploads entirely. One ICO built from the AVIF covers all of them, and a PNG to ICO step is no longer needed in between.

AVIF

AV1 Image File Format

AVIF stores still images and image sequences compressed with the AV1 video codec, and was finalised by the Alliance for Open Media in 2019. It usually produces smaller files than both JPEG and WebP at the same visual quality and supports transparency, animation, wide colour gamut and HDR. Encoding is slower than older formats, and very fine textures can look smoothed at low quality settings. All major browsers now display AVIF, but many desktop apps, social platforms and older devices cannot open it.

Compression: Lossy or lossless
Transparency: Yes
Animation: Yes
Introduced: 2019 · Alliance for Open Media

AVIF converter

ICO

Windows icon

ICO is the Microsoft icon format used for Windows program icons and website favicons. One .ico file can contain several images at different sizes, such as 16×16, 32×32, 48×48 and 256×256 pixels, so the system can pick the best fit. Each image can be stored as a bitmap or as PNG data and supports full alpha transparency. ICO is not meant for photos or large artwork. Browsers, Windows and most icon editors can read it.

Compression: Lossless
Transparency: Yes
Animation: No
Introduced: Microsoft

ICO converter

AVIF logos usually come from a modern site's image pipeline or a designer's web export, and the site still needs a classic favicon.ico at its root that every browser and crawler can read.

Icon sizes packed into the favicon.ico

Browser tab and address bar: 16 px
Bookmarks, taskbar shortcuts: 32 px
Windows large icons view: 256 px
All sizes in one favicon.ico: 1 file

Alpha kept

Transparent AVIF areas stay transparent in every size.

Downscaled per size

Each entry is resampled from the original, not from the next size up.

First frame only

An animated AVIF contributes its first frame.

Keeping an AVIF logo readable at 16 × 16

A 16 px icon has 256 pixels in total, so thin strokes, small text and gradients vanish. Before converting, export a simplified version of the logo: the symbol without the wordmark, thicker lines, and more contrast against both light and dark browser themes. A transparent background lets the tab color show through, which usually looks better than a white square.

Heavy AVIF compression can also leave soft edges or color smearing around sharp shapes. If your logo shows that, ask for a lossless AVIF or an SVG master; on large icons the artifacts are visible, while at 16 and 32 px the downscaling hides most of them. For background on how AVIF compares with WebP and HEIC, see AVIF, HEIC and WebP explained.

AVIF to ICO favicon questions

Can a browser use an AVIF file as a favicon directly?

Chrome, Firefox and Safari can display AVIF, but the file named favicon.ico at the site root is what browsers, feed readers and many link-preview bots request by default. Shipping a real ICO there avoids a 404 in your server logs and a blank tab icon in older clients.

My AVIF logo is not square. Will the icon be stretched?

Icons are square, so a wide logo either shrinks to a thin strip or gets distorted. Crop the logo to its symbol or initial first; how to crop an image to a ratio covers a 1:1 crop that keeps the subject centered.

Does the 10-bit color of an AVIF survive in the ICO?

No. Icon entries store 8 bits per channel plus an 8-bit alpha channel, so HDR or 10-bit AVIF data is reduced to standard sRGB color. At 16 or 32 px nobody can see the difference.

What does Google need for the favicon shown in search results?

Google's guidelines ask for a square favicon whose size is a multiple of 48 px, such as 48 × 48 or 96 × 96, referenced from the home page. The ICO from this page includes larger entries that Google can scale down.

Is AVIF to PNG a better option for an app icon?

For iOS, Android and web app manifests, yes; they expect PNG files at fixed sizes such as 180 × 180 and 512 × 512. Use AVIF to PNG for those and keep the ICO for the classic favicon and Windows.