JPEG / JPG photos
Removes
- EXIF data: camera and device details, date and time, embedded preview thumbnail, and GPS location
- XMP and IPTC/Photoshop data, embedded comments and other application-specific data blocks
Keeps
The image itself (it is not re-compressed), the standard JPEG header and the color profile. Extra data attached after the end of the image, such as the video in some "motion photos", is not removed. EXIF also holds the orientation flag, so some phone photos may show rotated afterward.