JFIF to JPG
Pictures saved from websites sometimes end in .jfif, and some programs and upload forms refuse them. Turn them into ordinary JPGs, as many as you like at once. The picture is copied exactly, and nothing leaves your device.
How to use it
- Choose your JFIF files, or drag them onto the box.
- Each one is checked and copied into a JPG on your device.
- Download each JPG, or all of them together as a ZIP file.
What is a JFIF file?
JFIF is the most common way of storing a JPG picture, so a .jfif file is almost always an ordinary JPG with an unusual name ending. Windows sometimes gives pictures saved from a web page the .jfif ending, and some programs and upload forms then refuse them because they look only at the ending.
No loss of quality
Because the picture inside is already a JPG, this page copies it exactly into a file ending in .jpg, without decoding and saving it again, so no quality is lost and the file size stays the same. Each file is opened first, so a damaged file is reported rather than passed on. Because the file is copied exactly, any hidden details it holds, such as where a photo was taken, stay in it.
If a file turns out not to be a JPG inside, for example a PNG saved with the wrong ending, it is converted into a JPG instead, and the result says so. See-through parts then become white.
Questions
Could I just rename the file?
Usually, yes: changing the ending from .jfif to .jpg is all this page does to a genuine JFIF file. The page is useful when you have many files, when file endings are hidden on your computer, or when you want each file checked.
Are my files uploaded?
No. The work happens inside your web browser, on your own device. Before your file is opened, this page locks itself: from then on your browser refuses to let it fetch, upload or send anything at all. You can check: once the page has loaded, switch off your internet connection and it will still work. How the lock works.