How do I convert AVIF to ICO?

Upload your AVIF file above. It is converted to ICO automatically (change the output format or quality in the Settings tab if you need to), then click Download. There is nothing to install.

Does converting AVIF to ICO lose quality?

Each icon size is scaled down from your image and stored without further compression, so small sizes stay crisp.

Will the ICO keep the transparent background?

Yes. ICO supports smooth, partial transparency, so transparent areas stay transparent.

AVIFファイルとは？

AVIF compresses still images with the AV1 video codec. It usually produces smaller files than JPG and WebP at the same visual quality and supports HDR and transparency.

What sizes does the ICO file include?

The standard icon sizes of 16, 32, 48, 64, 128 and 256 pixels, skipping any larger than your image. Browsers and Windows pick the best size automatically.

Is the AVIF to ICO converter free?

Yes. Convert, preview and download a single result without creating an account. Premium adds batch conversion (many files into one ZIP) and larger uploads.

Convert AVIF to ICO — Favicons and Windows Icons

Convert AVIF to ICO online to make a favicon or Windows icon in several sizes. No software to install. Preview one free or batch-convert with Premium.

Drop your AVIF file or click to browse

Why convert AVIF to ICO?

Transparent areas stay transparent: ICO supports smooth, partial transparency just like AVIF.
One ICO bundles the standard 16 to 256 px icon sizes (up to the size of your image), ready for a favicon.ico or a Windows shortcut.

What to expect when converting AVIF to ICO

アイコンは正方形のため、正方形でない画像は透明な正方形の中央に配置されます。元の画像より大きなサイズは作成されないため、256 × 256ピクセル以上の画像から始めてください。
元のAVIFファイルは変更されません。新しいICOのコピーをダウンロードします。

AVIFとICOの比較

機能	AVIF	ICO
氏名	AV1 Image File Format	Windowsアイコン
由来	Released by the Alliance for Open Media in 2019	Created by Microsoft for Windows icons
圧縮	非可逆または可逆	Lossless images at several sizes
透過	Yes — smooth, partial transparency	Yes — smooth, partial transparency
アニメーション	はい	いいえ
色	8, 10 or 12 bits per channel, including HDR	透過対応のフルカラー
開けるアプリ	Current Chrome, Edge, Firefox and Safari 16+; fewer editing apps	Browsers (as favicon.ico), Windows and icon editors
こんな方に最適	the smallest high-quality images for websites and apps	website favicons and Windows app or shortcut icons
主な欠点	作成に時間がかかり、多くの編集アプリや古いデバイスでは開けない	icons are square and at most 256 × 256 pixels

In short: choose AVIF for the smallest high-quality images for websites and apps; choose ICO for website favicons and Windows app or shortcut icons.

Frequently asked questions

How do I convert AVIF to ICO?: Upload your AVIF file above. It is converted to ICO automatically (change the output format or quality in the Settings tab if you need to), then click Download. There is nothing to install.
Does converting AVIF to ICO lose quality?: Each icon size is scaled down from your image and stored without further compression, so small sizes stay crisp.
Will the ICO keep the transparent background?: Yes. ICO supports smooth, partial transparency, so transparent areas stay transparent.
AVIF or ICO: which should I use?: Use AVIF for the smallest high-quality images for websites and apps. Use ICO for website favicons and Windows app or shortcut icons. Keep in mind the main drawback of ICO: icons are square and at most 256 × 256 pixels.
AVIFファイルとは？: AVIF compresses still images with the AV1 video codec. It usually produces smaller files than JPG and WebP at the same visual quality and supports HDR and transparency.
What sizes does the ICO file include?: The standard icon sizes of 16, 32, 48, 64, 128 and 256 pixels, skipping any larger than your image. Browsers and Windows pick the best size automatically.
Is the AVIF to ICO converter free?: Yes. Convert, preview and download a single result without creating an account. Premium adds batch conversion (many files into one ZIP) and larger uploads.

AVIFからICOへでできること

始める前に、主な機能を確認してください。

Convert AVIF files to ICO online
Bundle standard icon sizes from 16 to 256 px in one file
Switch to any other output format in Settings
Batch-convert many AVIF files into one ZIP
Preview the result before you download

このツールを使用する

設定リファレンス

AVIFからICOへで使用可能なコントロール。

設定

出力形式ドロップダウン: Chooses the file type you download. The page opens on its own output format; switch to any other format before converting.オプション: JPGPNGWebPAVIFGIFTIFFBMPICOPDF
品質スライダーレンジ: 20–100 · デフォルト: 90: For JPG, WebP, AVIF and image-to-PDF output: higher keeps more detail but makes a bigger file; 60–80 suits most photos. Documents (Publisher, XPS, EPS…) become PDFs with every page and sharp text, with no quality setting.
ロスレスモードオン/オフ: For WebP and AVIF output: keeps every pixel exactly (best for logos, graphics and transparency) at the cost of a larger file.
背景の塗りつぶしカラーピッカー: 透過を保存できないJPG、BMP、画像からPDFへの出力用：透明な部分を塗りつぶす色（既定は白）。