JFIF to ICO Converter

What happens when you convert JFIF to ICO

• The image is decoded and written as a PNG-based icon of up to 256 by 256 pixels.
• Icons are limited to 256 by 256 pixels, so larger images are scaled down to fit, keeping their proportions.
• ICO is lossless, so no further detail is lost, but it cannot restore detail the JFIF compression already removed. Expect a larger file.

How to convert JFIF to ICO online

1. Press "Choose JFIF files" and select one or more files, or drag them onto the box. You can add files of any size your device can hold in memory.
2. Adjust the settings if you need to. The output is lossless, so there is no quality setting to worry about.
3. Press "Convert to ICO". Images convert in a second or two each.
4. Save each ICO with its download button. Close the tab and every trace of the files is gone from memory.

Why convert JFIF to ICO?

JFIF files usually come from images saved from web pages in Chrome and Edge on Windows. People convert them to ICO because ICO is the format browsers and Windows use for website and program icons.

In short, JFIF is good at what it was made for, and ICO is the more practical choice when the file has to open, upload or print somewhere else. JFIF opens in browsers, though some desktop apps do not recognise the extension, while ICO shown by browsers as a favicon; opening one directly depends on the viewer.

How to convert JFIF to ICO on Windows, Mac, iPhone and Android

On Windows

Open this page in Chrome, Edge or Firefox, drag your JFIF files in from File Explorer, and press Convert. Each ICO is saved to your Downloads folder.

On a Mac

Safari, Chrome and Firefox all work. Drag the JFIF files from Finder onto the drop zone and the ICO files land in Downloads.

On iPhone and iPad

Open the page in Safari and tap Choose JFIF files. You can pick from Photos or from the Files app. The converted ICO appears in Files, in the Downloads folder; to put it in your photo library, open it there, tap Share and choose Save Image.

On Android

Open the page in Chrome, tap Choose JFIF files and pick them from Files or your gallery. The ICO is saved to the Download folder, where any file manager can find it.

Best settings for JFIF to ICO

Icons are square by convention and can be at most 256 by 256 pixels. Choose 256 for modern Windows and high-resolution screens, 48 or 32 for classic desktop icons, and 16 or 32 for a website favicon. Non-square images are scaled to fit without being stretched.

JFIF vs ICO: the differences

About JFIF and ICO files

What is a JFIF file?

A JFIF file is an ordinary JPEG with a different extension. Windows started labelling saved web images .jfif after a registry change, which is why photo editors and upload forms sometimes refuse a file that is really a JPEG.

What is an ICO file?

An ICO file is a small container that can hold several sizes of the same icon, and since Windows Vista each size may be stored as an embedded PNG. The largest size an ICO can hold is 256 by 256 pixels.

JFIF to ICO not working? Common problems

• Colours look slightly different. Browsers convert images to the standard sRGB colour space when they decode them, so wide-gamut and CMYK images can shift a little.
• A phone photo comes out upright even though it looked sideways elsewhere. That is correct: the rotation stored in the photo is applied during conversion, so the ICO is always the right way up.
• The file is bigger than expected. The ICO is usually larger, because it stores every pixel without compression losses, while the JFIF was compressed lossily.

Convert JFIF to ICO from the command line

If you work in a terminal, ImageMagick converts JFIF to ICO in one line:

magick input.jfif output.ico

To convert every JFIF in a folder at once, use magick mogrify -format ico *.jfif. The converter on this page does the same job without installing anything.