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You saved an image and it has a .jfif extension instead of .jpg. Don't panic — it's the same thing. JFIF (JPEG File Interchange Format) defines exactly how JPEG image data should be stored, including colour space, aspect ratio, and thumbnail information. Every JPG file you've ever seen follows the JFIF or Exif specification, whether or not it uses the .jfif extension.
The .jfif extension shows up most commonly when saving images from web browsers on Windows. Chrome and Edge sometimes save JPEG images with the .jfif extension based on the MIME type metadata. The file is functionally identical to a .jpg — you can rename it from .jfif to .jpg and everything works exactly the same.
Every image viewer opens .jfif files. If a program refuses the extension (some picky upload forms reject it), rename to .jpg — the file contents are identical. For compressing JFIF images, <a href="https://fwip.app/tools/compress-image/">fwip</a> handles them exactly like any other JPEG.
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