.JFIF File Extension
JPEG File Interchange Format
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What is a JFIF file?
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The JFIF format defines a number of details that had been left undefined in the initial JPEG format. Defining these details, including a standard header, resolution and aspect ratio, and color model, allowed users to actually save and share files using JPEG compression.
For a long time, many digital cameras saved images in the JFIF format. But over time, additional improvements to the JPEG format rendered the JFIF format mostly obsolete.
NOTE: Some Windows 10 updates can cause web browsers, such as Microsoft Edge, to mistakenly save .JPG files as JFIF files. To fix this issue, you must revert your Windows Registry to saving JPEG images as .jpg files.
How to open a JFIF file
You can open JFIF files using a variety of Windows and macOS programs, including the Photos and Preview apps bundled with the operating systems. To open a JFIF file in Preview, you may have to drag the file into Preview, rather than attempting to open it through Finder.
You can also open a JFIF file in your web browser by dragging the file into your browser window.
How to convert a JFIF file
Several applications, including Microsoft Paint and Apple Preview, can convert JFIF files to other formats.
For example, Microsoft Paint can convert JFIF files to the following image formats: