Why convert JPEG to JPG?
Some upload forms, older software, or web services only accept .jpg and reject .jpeg, even though both extensions refer to the same .JPG format. Renaming fixes the problem without re-encoding the image and without any quality loss.
How to convert JPEG to JPG
Rename the file BUILT-IN
In File Explorer (Windows) right-click › Rename and change .jpeg to .jpg; in Finder (macOS) press Return to rename and confirm the extension change.
Command line - mv CLI
Run mv photo.jpeg photo.jpg to rename a single file with no re-encoding.
IrfanView batch rename FREE
Use File › Batch Conversion/Rename to rename many .jpeg files to .jpg in one step.
Preview - Export BUILT-IN
Open the file in Preview, choose File › Export, and type a .jpg filename to re-save with the new extension.
Programs that convert JPEG
About these formats
.JPEG
JPEG Image
A JPEG file is a compressed photo or image - the same format as .jpg, byte for byte. Every operating system opens it without extra software: double-click and Windows Photos, macOS Preview,…
Open .JPEG details →
.JPG
JPEG Image
A JPG (also .jpeg) is a compressed photo or image in the JPEG format, standardized in 1992. Every operating system opens it natively - double-click and Windows Photos, macOS Preview, or…
Open .JPG details →Quality & what to watch
- Renaming does not re-encode the image - quality is completely unchanged.
- If you open the file in an editor and re-save as
.jpg, one extra lossy compression pass occurs; set quality to 100 to minimize the impact. - Exif metadata (camera model, date, GPS) is preserved when you rename; some editors may strip it when you re-save.
