How do I convert JFIF to ICO?

Upload your JFIF 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 JFIF to ICO lose quality?

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

JFIF or ICO: which should I use?

Use JFIF for nothing a JPG can’t do — it holds the same image data. 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.

A .jfif file is a JPEG with an unusual extension; Windows and some browsers save web images this way. The picture is identical to a .jpg, but many sites and apps refuse the .jfif name.

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 JFIF 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 JFIF to ICO — Favicons and Windows Icons

Convert JFIF 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 JFIF file or click to browse

Why convert JFIF 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.
Browsers show the ICO as your site’s tab and bookmark icon when you save it as favicon.ico.

What to expect when converting JFIF to ICO

Icons are square, so a non-square image is centred on a transparent square. Sizes larger than your image aren’t created, so start from at least 256 × 256 pixels.
Your original JFIF file isn’t changed: you download a new ICO copy.

JFIF vs ICO

機能	JFIF	ICO
氏名	JPEG File Interchange Format	Windows Icon
Origin	Defined in 1992 as the standard JPEG file layout	Created by Microsoft for Windows icons
圧縮	Lossy (it is a JPEG)	Lossless images at several sizes
Transparency	いいえ	Yes — smooth, partial transparency
アニメーション	いいえ	いいえ
色	16.7 million colours (8 bits per channel)	Full colour with transparency
Where it opens	Most image viewers, but many upload forms reject the .jfif extension	Browsers (as favicon.ico), Windows and icon editors
こんな方に最適	nothing a JPG can’t do — it holds the same image data	website favicons and Windows app or shortcut icons
Main drawback	upload forms and some apps reject the .jfif extension	icons are square and at most 256 × 256 pixels

In short: choose JFIF for nothing a JPG can’t do — it holds the same image data; choose ICO for website favicons and Windows app or shortcut icons.

Frequently asked questions

How do I convert JFIF to ICO?: Upload your JFIF 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 JFIF to ICO lose quality?: Each icon size is scaled down from your image and stored without further compression, so small sizes stay crisp.
JFIF or ICO: which should I use?: Use JFIF for nothing a JPG can’t do — it holds the same image data. 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.
What is a JFIF file?: A .jfif file is a JPEG with an unusual extension; Windows and some browsers save web images this way. The picture is identical to a .jpg, but many sites and apps refuse the .jfif name.
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 JFIF 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.

JFIF to ICO 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 JFIF 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 JFIF 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

JFIF to ICO 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: For JPG, BMP and image-to-PDF output, which can’t store transparency: the colour that fills transparent areas (white by default).