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You have a file with a .jpeg extension instead of .jpg. They are the same format, the same compression, the same everything. The only reason both extensions exist is that early versions of Windows and DOS limited file extensions to three characters. The three-letter .jpg became standard, but .jpeg (the full name) has always been equally valid.
Some cameras, particularly older digital cameras and some smartphones, save photos with the .jpeg extension. macOS tends to use .jpeg in some contexts. Web servers and image editors handle both identically. No application on earth treats .jpg and .jpeg differently — they share the same MIME type (image/jpeg) and the same file structure.
Every image viewer, every browser, and every operating system handles .jpeg files. If an upload form or application rejects .jpeg, rename to .jpg — but this is extremely rare with modern software. For compression, <a href="https://fwip.app/tools/compress-image/">fwip</a> handles .jpeg files exactly like .jpg.
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