When you photograph a document, a spare room in a house or a whiteboard in a meeting, the picture is rarely just the picture. Cameras and phones attach metadata as they save, and it travels with the file.
What is usually in there
- GPS coordinates. Often accurate to a few metres, which is enough to identify a building.
- Device details. Make, model and sometimes a serial number.
- Timestamps. When the photo was taken and when it was edited, which can reveal routines.
- Editing history. Some apps embed a thumbnail of the original image, so a crop or a blur can be reversed by extracting it.
- Free text. Names, notes and rights fields that were filled in somewhere along the way.
Stripping it is not just deleting one tag
Metadata lives in several places at once: EXIF, IPTC, XMP and application segments such as APP0 and JFXX, including embedded thumbnails. Removing one block and leaving the others is a common half-fix. Orientation is the other trap: it is stored as a tag, so if you delete everything the picture can rotate when it is next opened.
What to check afterwards
- The clean copy opens with the same dimensions and orientation as the original.
- No EXIF or GPS blocks remain in the output.
- The original file is still on disk in case you need it.
- Transparency and colour in PNGs survive the pass.
Doing it in bulk
Offline Photo Metadata Cleaner inspects a photo before you clean it, shows what was found, writes a separate verified copy and checks the result. One photo at a time is free; batch cleaning is part of Pro. Everything happens on your PC, so the file never has to leave the machine that already holds it.