JPEG to JPG: Rename or Convert
A .jpeg file and a .jpg file hold exactly the same kind of picture. Here is when renaming is enough, and when converting fixes a file that only pretends to be JPEG.
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JPG, BMP and EPS have no transparency. Transparent pixels are filled with this color.
Hex color used behind transparent pixels, e.g. #FFFFFF.
This format holds a single image. Choose GIF or WebP output if you want to keep the animation.
A multi-size icon contains several resolutions in one file; browsers and operating systems pick the one they need.
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Are JPEG and JPG different formats?
No. .jpeg and .jpg are two spellings of one format, with the same data inside. Renaming the file is enough unless the file is not really a JPEG.
- Media type
- image/jpeg
- Standard
- ITU-T T.81
- This page
- Quality 95, details kept
The JPEG format has one history, whatever the extension
Why two extensions exist
The format is named after the Joint Photographic Experts Group, the committee that wrote ITU-T T.81 in 1992. Its natural extension is .jpeg. But MS-DOS and early Windows used short 8.3 file names, eight characters, a dot and at most three more, a limit Microsoft still documents in its file naming rules. So .jpeg became .jpg on those systems.
Mac and Unix systems had no such limit and kept .jpeg. Cameras settled on .JPG, web servers learned to serve both, and the media type for either is image/jpeg. Today a phone, a browser or an editor opens both without noticing the difference. The timeline above shows the standards behind the format; none of them depends on which spelling you use.
JPEG on both sides
JPG
JPG photo
A photo file with the long .jpeg extension, common on Macs, in web downloads and from some apps. The data inside is standard lossy JPEG: one still image, no transparency, readable by every device.
- Lossy
- No transparency
- Still images only
JPG
JPG photo
The same JPEG format with the short .jpg extension, used by cameras, Windows and most upload forms. Nothing about the picture changes; only the label differs.
- Lossy
- No transparency
- Still images only
Why convertHere the format does not change at all, only the extension. Rename when the file is a real JPEG and a system insists on .jpg; convert when the content turns out to be something else. To work with the picture losslessly instead, see JPEG to PNG.
Because both sides are the same format, the comparison above has nothing to trade. That makes this page different from every other conversion on the site: the right answer is often not to convert at all, but to rename the file.
Renaming keeps the exact bytes, so there is no loss. Converting decodes the picture and encodes a new JPEG, which is a lossy save, however small. At quality 95 the difference is invisible, but it is still a new file.
Upload forms are the one place where the spelling still matters. A form built with a strict list of allowed extensions may contain .jpg but forget .jpeg, or the other way round. The picture is fine; the list is incomplete. A renamed or converted file with the expected extension passes.
Renaming many files at once
On Windows, open the folder in File Explorer, type cmd in the address bar and press Enter to open a Command Prompt there. The command below changes the extension of every .jpeg file in that folder in one step. On a Mac, select the files in Finder, choose Rename from the right-click menu and replace .jpeg with .jpg.
If File Explorer hides extensions, turn on File name extensions under the View menu first, otherwise you may end up with names like photo.jpg.jpeg.
Windows Command Prompt: rename every .jpeg in the folder to .jpg
ren *.jpeg *.jpgWhen converting is the better fix
Sometimes a renamed file is still rejected. That usually means it was never a JPEG. Pictures saved from websites can be WebP or AVIF with a .jpeg name, and photos exported from some phones are HEIC with a changed extension. A form that checks the content, not the label, sees through the rename.
Converting solves that, because the converter reads the real format and writes a genuine JPEG. This page uses quality 95 and keeps the date and camera details, so the result stays close to the original. For a smaller file instead, lower the quality, or use Compress Image when a form sets a size limit.
Converting is also useful when you want a batch of mixed files, some .jpeg, some .jpg and some other formats, rewritten in one consistent way. Up to 20 files fit in a batch.
Renaming changes only the extension, never the picture, so it is safe to run on a copy of the folder first. If any file then refuses to open, it was probably not a JPEG to begin with, and converting it here is the fix.
Need a different target altogether, such as PNG or WebP? The Image Converter page takes the same files with every output option.
How to convert JPEG to JPG
Add the .jpeg files
Drop up to 20 files on the box above, or press Choose Files. Files with any image extension are accepted.
Keep the high quality preset
Quality 95 with photo details kept is preset, so the new files stay as close to the originals as a fresh JPEG save allows.
Convert and download
Press Convert to JPG. Every result ends in .jpg and contains real JPEG data.
JPEG to JPG questions
Is there any quality difference between JPEG and JPG?
None. The extension is only a label. A photo saved as .jpeg and the same photo saved as .jpg contain identical data, and every program treats them the same.
Why do some files end in .jpeg and others in .jpg?
Early Windows and DOS file systems allowed only three characters after the dot, so the format's name was cut to .jpg. Systems without that limit often use the full .jpeg. Both stuck, and both are registered for the image/jpeg media type.
Can I just rename .jpeg to .jpg?
Yes, if the file really is a JPEG. Renaming is instant and loses nothing. Converting is only needed when the file is actually another format with a .jpeg name, or when you want every file rewritten the same way.
Does converting JPEG to JPG reduce quality?
Slightly, because the converter decodes the picture and saves it as a new JPEG. At the preset quality of 95 the change is not visible, but renaming avoids it entirely when renaming is enough.
A website rejected my .jpeg file. Will a .jpg version pass?
Often it will. Some forms check the extension against a list that only contains .jpg. Others check the content, and if your file is really a WebP or HEIC with the wrong name, converting turns it into a genuine JPEG that passes.
How do I rename many .jpeg files to .jpg on Windows?
Open Command Prompt in the folder and run ren *.jpeg *.jpg. It changes every matching extension at once without touching the image data.
| Other ways to get JPG | |
|---|---|
| Other ways to get PNG | |
| Other ways to get WEBP | |
| Other ways to get ICO | |
| Other ways to get VTF | |
| Related conversions |
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