JPG to ICO Converter

When you need JPG to ICO

ICO is the format for icons: the favicon shown on a browser tab, program icons, and Windows folder icons. If you have a JPG logo or photo and need to create a favicon from it, converting to ICO is the direct approach. The same goes for desktop shortcut icons on Windows or application icons.

The key thing to understand: ICO is designed for small sizes. Standard icon sizes are 16x16, 32x32, and 48x48 pixels. When a photo is scaled down to these dimensions, most of its detail simply disappears. The simpler and more high-contrast the source image, the better the resulting icon will look.

What changes after conversion

The JPG image is scaled down to icon dimensions. This is the main limitation: a detailed photo with small elements will not make a good icon. However, a simple logo, a one- or two-letter monogram, or a schematic image can remain quite readable at small sizes.

JPG does not support transparency, so the background in the ICO file will remain opaque. If you need an icon with a transparent background, start from a PNG with an alpha channel rather than a JPG.

EXIF and other JPG metadata are not carried over to ICO - this is technically unnecessary for an icon file.

When it is especially useful

Website favicon

A favicon is the small icon that appears on browser tabs, in the address bar, and in bookmarks. An ICO file placed in the root of a website is recognized by browsers automatically, even without an explicit reference in the HTML code. If you only have a JPG logo, converting it to ICO gives you a working favicon quickly.

Before converting, crop the logo to a square and confirm that the main element is clearly visible when scaled down. If the logo is horizontal and contains text next to a symbol, use only the symbol part for the favicon.

Windows shortcut icons

Default folder and shortcut icons can be replaced with your own. This is useful when working with many projects: different icons help you navigate quickly in File Explorer. For this purpose, icon quality matters but does not need to be perfect - it just needs to be recognizable on the desktop.

Windows application icon

When developing or customizing Windows software, the application icon is stored in ICO format. Converting a JPG to ICO is a quick way to get a working file to include in a project.

What to check after converting

1. Open the ICO file in Windows and see how the icon looks on the desktop at standard and large sizes.
2. For a favicon: place the file on a test page and check how it appears on a browser tab.
3. Confirm that the main element is still recognizable at 16x16 - this is the most common display size.
4. If the icon looks too small or blurry, try a source image with a simpler and larger main element.

Format limitations

ICO is not designed for regular images. Converting a random photo to ICO makes no practical sense: icons are used specifically as small icons, not as full-size pictures. The standard maximum size is 256x256 pixels.

You cannot get a transparent background in an ICO from a JPG source - transparency is only possible when starting from a PNG with an alpha channel. For a professional favicon with a cut-out logo, prepare a PNG source beforehand.

Modern browsers accept PNG directly as a favicon, so ICO is only strictly required for compatibility with very old versions of Internet Explorer.

Related tasks

If you need a PNG version of the source for better icon quality, use JPG to PNG - PNG with transparency gives a cleaner result when creating icons. If the source image needs to be delivered in a web format, see JPG to WebP. For preparing a logo as a document, JPG to PDF fits.