How do I convert ICO to WebP?

Upload your ICO file above. It is converted to WebP 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 ICO to WebP lose quality?

WebP is lossy by default, so some fine detail is discarded to make the file smaller. Raise the quality or switch on lossless in Settings for a closer copy.

Will the WebP keep the transparent background?

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

ICOファイルとは？

An ICO file bundles one picture at several sizes, from 16 to 256 pixels, so browsers and Windows can pick the sharpest version for a tab, bookmark or desktop shortcut.

Is the ICO to WebP 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 ICO to WebP — Smaller Images for Faster Sites

Convert ICO to WebP online for smaller web images that keep transparency. No software to install. Preview one free or batch-convert with Premium.

Drop your ICO file or click to browse

Why convert ICO to WebP?

Transparent areas stay transparent: WebP supports smooth, partial transparency just like ICO.
WebP is made for websites, online stores and blogs that need fast-loading images.

What to expect when converting ICO to WebP

WebP uses lossy compression by default; raise the quality or switch on lossless in Settings for a closer copy.
元のICOファイルは変更されません。新しいWebPのコピーをダウンロードします。

ICOとWebPの比較

機能	ICO	WebP
氏名	Windowsアイコン	WebP
由来	Created by Microsoft for Windows icons	Released by Google in 2010
圧縮	Lossless images at several sizes	非可逆または可逆
透過	Yes — smooth, partial transparency	Yes — smooth, partial transparency
アニメーション	いいえ	はい
色	透過対応のフルカラー	チャンネルあたり8ビット
開けるアプリ	Browsers (as favicon.ico), Windows and icon editors	All current browsers; some older desktop apps and upload forms reject it
こんな方に最適	website favicons and Windows app or shortcut icons	websites, online stores and blogs that need fast-loading images
主な欠点	icons are square and at most 256 × 256 pixels	古いアプリや一部のアップロードフォームでは受け付けられない

In short: choose ICO for website favicons and Windows app or shortcut icons; choose WebP for websites, online stores and blogs that need fast-loading images.

Frequently asked questions

How do I convert ICO to WebP?: Upload your ICO file above. It is converted to WebP 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 ICO to WebP lose quality?: WebP is lossy by default, so some fine detail is discarded to make the file smaller. Raise the quality or switch on lossless in Settings for a closer copy.
Will the WebP keep the transparent background?: Yes. WebP supports smooth, partial transparency, so transparent areas stay transparent.
ICO or WebP: which should I use?: Use ICO for website favicons and Windows app or shortcut icons. Use WebP for websites, online stores and blogs that need fast-loading images. Keep in mind the main drawback of WebP: older apps and some upload forms don't accept it.
ICOファイルとは？: An ICO file bundles one picture at several sizes, from 16 to 256 pixels, so browsers and Windows can pick the sharpest version for a tab, bookmark or desktop shortcut.
Is the ICO to WebP 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.

ICOからWebP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 ICO files to WebP online
Choose WebP quality or switch to lossless
Switch to any other output format in Settings
Batch-convert many ICO 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

ICOからWebP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）。