How do I convert JPG to ICO?

Upload your JPG 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 JPG to ICO lose quality?

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

JPG or ICO: which should I use?

Use JPG for photos you share, email, print or upload. 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.

JPGファイルとは？

JPG is the standard format for photos. It shrinks files by discarding detail the eye barely notices, which suits photographs but blurs text and sharp edges.

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 JPG 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 JPG to ICO — Favicons and Windows Icons

Convert JPG 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 JPG file or click to browse

Why convert JPG to ICO?

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.
favicon.icoとして保存すると、ブラウザはそのICOをサイトのタブやブックマークのアイコンとして表示します。

What to expect when converting JPG 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JPG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。

JPGとICOの比較

機能	JPG	ICO
氏名	JPEG (Joint Photographic Experts Group)	Windowsアイコン
由来	1992年に標準化	Created by Microsoft for Windows icons
圧縮	非可逆、画質を調整可能	Lossless images at several sizes
透過	いいえ	Yes — smooth, partial transparency
アニメーション	いいえ	いいえ
色	1,670万色（チャンネルあたり8ビット）	透過対応のフルカラー
開けるアプリ	All browsers, phones, computers and photo apps	Browsers (as favicon.ico), Windows and icon editors
こんな方に最適	photos you share, email, print or upload	website favicons and Windows app or shortcut icons
主な欠点	no transparency, and every re-save loses a little more detail	icons are square and at most 256 × 256 pixels

In short: choose JPG for photos you share, email, print or upload; choose ICO for website favicons and Windows app or shortcut icons.

Frequently asked questions

How do I convert JPG to ICO?: Upload your JPG 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 JPG to ICO lose quality?: Each icon size is scaled down from your image and stored without further compression, so small sizes stay crisp.
JPG or ICO: which should I use?: Use JPG for photos you share, email, print or upload. 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.
JPGファイルとは？: JPG is the standard format for photos. It shrinks files by discarding detail the eye barely notices, which suits photographs but blurs text and sharp edges.
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 JPG 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.

JPG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 JPG 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 JPG 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

JPG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）。