How to Convert JPG to JPEG (and JPEG to JPG)
Updated August 31, 2026
Let's save you some time: JPG and JPEG are the exact same image format. The three-letter version exists because old versions of Windows only allowed three-letter file extensions, and both spellings stuck. There is no quality difference, no size difference, no technical difference at all.
And yet forms and software still occasionally demand one spelling and reject the other, which is why this page exists. Here's the fastest fix on Windows and Mac.
How to convert JPG to JPEG
- 1
Drag your files into ConvertSave
Open ConvertSave and drag your JPG images into the window. You can drop one file or a whole selection at once. There is no upload step, because the files never leave your computer.
- 2
Choose JPEG as the output format
Pick JPEG from the format list. ConvertSave shows the formats that make sense for the files you dropped, so JPEG is right there.
- 3
Click Convert
Hit the Convert button. Each JPEG file is saved next to the original, so you don't have to hunt through folders to find your converted files. The originals are left untouched.
ConvertSave offers both JPG and JPEG as outputs precisely for this situation, and it'll happily do a whole folder at once.
JPEG to JPG works the same way
Same steps in reverse: drag the .jpeg files in and pick JPG. Useful when a legacy system insists on three-letter extensions.
The honest tip: renaming usually works too
Because the formats are identical, simply renaming photo.jpg to photo.jpeg satisfies most software. Use a converter when renaming doesn't, some validators check the file properly, when you have hundreds of files, or when you're already converting other formats in the same batch anyway.
Is JPG to JPEG conversion safe?
The risk with converting photos isn't the conversion itself, it's where the conversion happens. Free converter websites work by uploading your file to someone else's server. You usually can't tell who runs the server, where it is, or how long your file sticks around after the conversion finishes. For personal videos and photos that's a real privacy trade, and it's the reason so many of those sites are covered in aggressive ads.
ConvertSave does the conversion on your own computer. Nothing is uploaded anywhere. You can turn off Wi-Fi entirely and it still works, which is also the easy way to verify the claim. Your original file is never modified, and the converted copy is written right next to it.
Frequently asked questions
Is there any difference between JPG and JPEG?
No. Same format, same compression, same everything. JPG is just the three-letter spelling from the DOS era.
Will converting between them change my photo's quality?
Not noticeably; the conversion writes a high-quality copy and your original is untouched. If a simple rename works for your case, that changes nothing at all.
Why does a website reject .jpg but accept .jpeg?
An overly literal file-extension check on their end. Producing the extension it wants, by rename or conversion, is the practical fix.
Is ConvertSave free?
There's a 7-day free trial with all features unlocked. After that it's $9/month, $60/year, or $129 once for a lifetime license that covers 3 personal devices on Mac and Windows.
