What your photos say about you: the metadata fields to check before you share
A phone photo is two things: the picture, and a hidden record of where, when and with what it was taken. The record is called EXIF metadata, and it travels with the file unless something removes it. Here is how to look a
A phone photo is two things: the picture, and a hidden record of where, when and with what it was taken. The record is called EXIF metadata, and it travels with the file unless something removes it. Here is how to look at it, and which fields to care about first.
How to look, with what you already have
Looking does not change the file.
- Windows: right-click the file, choose Properties, open the Details tab.
- Mac: open the photo in Preview and choose Tools > Show Location Info. That shows location only.
- iPhone: in Photos, tap the photo, then swipe up or tap the Info button. Apple says this shows the date and time, file name, iPhone model, camera settings and a map of where it was taken.
Each built-in viewer chooses what to show, and none of them claims to list every field. If you want the full list for one file, use a tool that reads the file itself.
The fields, ranked by how much they give away
- GPS. Latitude and longitude, stored as degrees, minutes and seconds plus N/S and E/W. A pair like 48° 51' 30.2" N, 2° 17' 40.2" E is 48.8584, 2.2945 in decimal form (south and west become negative numbers). GPS.gov says smartphones are typically accurate to within about 4.9 m (16 ft) under open sky, so assume the pair points at the building you were in or a few metres from it. Extra decimal places do not make it more accurate.
- Date and time. When the photo was taken, created and modified.
- Serial numbers. The camera body serial number and the lens serial number identify a particular device, not just a model.
- Owner, artist, copyright and software tags. These can name you or the tools you use.
- Embedded thumbnail. A small second copy of the picture inside the file.
- XMP and IPTC blocks. Separate metadata that can hold titles, captions and keywords.
Camera make and model matter least on their own. Check GPS first, then the rest.
What removing metadata does not fix
It does not touch what is visible in the picture: a street sign, a house number or a face is still there. And it cannot clean what a website or app stores after you upload it. Removing metadata only helps for the copy you share.
Check the result
Whatever you use to clean a photo, read the file again afterwards and confirm the fields are gone. Do not take the tool's word for it.
We build a small browser tool for this, Photo Scrubber: it lists what a photo holds, cuts the metadata out of JPG, PNG and WebP files without re-saving the picture, and re-reads the clean copy so you can see what is left. It runs in your browser and nothing is uploaded. Our guide walks through the same lookup with sources: how to see what metadata a photo has.
Originally published by Dev.to Security. Aggregated on AIWithGhost for educational purposes — full credit and traffic to the original publisher.