JPG vs JPEG: What’s the Difference? (Plus JFIF and JPE)
Short answer: there is no difference. JPG and JPEG are two extensions for exactly the same image format, with the same quality and the same compatibility. Here is why there are two names — and what to do when a website insists on one of them.
Open the JPEG to JPG tool → Free, nothing is uploaded
Why there are two names
JPEG is the name of the format, after the Joint Photographic Experts Group that published the standard in 1992. MS-DOS and early Windows allowed only three characters after the dot in a file name, so Windows programs saved photos as .jpg. Macs and Unix systems had no such limit and used .jpeg. Both stuck: .jpg is the most common spelling today, but cameras, phones and websites use either.
Is the quality different?
No. The extension is just part of the file name; the image inside a .jpg and a .jpeg file is the same kind of JPEG. Quality depends on the compression level chosen when the photo was saved, never on the extension.
JFIF, JPE and other relatives
| Extension | Inside | Where you see it |
|---|---|---|
| .jpg | JPEG | Phones, cameras, Windows — the usual spelling |
| .jpeg | JPEG | Macs, some cameras, websites and editors |
| .jfif | JPEG | Pictures saved from Chrome or Edge on some Windows PCs |
| .jpe | JPEG | Older Windows and Unix software |
JFIF and Exif are two ways of packaging the JPEG data inside a file. Files only end in .jfif when a Windows setting makes browsers save pictures that way — see why images save as JFIF.
How to change .jpeg to .jpg (or back)
Because the format is the same, renaming is enough: change photo.jpeg to photo.jpg. On Windows, first turn on View → Show → File name extensions in File Explorer. For many files, or on a phone, use the JPEG to JPG converter (or JPG to JPEG): it renames a whole batch at once and copies the image data without re-compressing it.
When a website rejects your file
If an upload form says “JPG only” and refuses your .jpeg, it is checking the file name. Change the extension to .jpg and try again. If it complains about the file size instead, compress the image — the extension is not the problem then.
Frequently asked questions
Should I save photos as JPG or JPEG?
It does not matter — pick either. .jpg is a little more common and accepted by every upload form, so it is the safer choice for files you share.
Is JPEG lossless?
No. JPEG, whichever extension it has, always uses lossy compression. For lossless images use PNG — or keep JPEG at high quality (90% or more) and avoid re-saving the same photo again and again.
Does renaming JPEG to JPG change the file size?
No. Renaming changes only the name. Our converter copies the image data unchanged as well; at most it removes the GPS location from the metadata, which saves a few bytes.