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.

什么是 JFIF 文件？

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.
当您将 ICO 保存为 favicon.ico 时，浏览器会将其显示为您网站的标签页和书签图标。

What to expect when converting JFIF to ICO

图标是正方形的，因此非正方形图片会居中放置在透明正方形上。不会生成比您的图片更大的尺寸，所以请从至少 256 × 256 像素的图片开始。
您原来的 JFIF 文件不会被更改：您下载的是一份新的 ICO 副本。

JFIF 与 ICO 对比

功能	JFIF	ICO
全名	JPEG File Interchange Format	Windows 图标
来源	Defined in 1992 as the standard JPEG file layout	Created by Microsoft for Windows icons
压缩	有损（它就是 JPEG）	Lossless images at several sizes
透明度	否	Yes — smooth, partial transparency
动画	否	否
颜色	1670 万种颜色（每通道 8 位）	全彩并支持透明
可用什么打开	Most image viewers, but many upload forms reject the .jfif extension	Browsers (as favicon.ico), Windows and icon editors
最适合	没有 JPG 做不到的——它保存的是相同的图像数据	website favicons and Windows app or shortcut icons
主要缺点	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.
什么是 JFIF 文件？: 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.

使用 JFIF 转 ICO 可以做什么

在开始之前查看主要功能。

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

使用这个工具

设置参考

JFIF 转 ICO 的可用控件。

设置

输出格式下拉框: Chooses the file type you download. The page opens on its own output format; switch to any other format before converting.选项: JPGPNGWebPAVIFGIFTIFFBMPICOPDF
质量滑块范围: 20–100 · 默认: 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.
无损模式开／关: For WebP and AVIF output: keeps every pixel exactly (best for logos, graphics and transparency) at the cost of a larger file.
背景填充取色器: 适用于无法存储透明度的 JPG、BMP 和图片转 PDF 输出：用于填充透明区域的颜色（默认为白色）。