What your photos reveal

A photo is more than the picture. The file also carries a block of notes written by the camera, called EXIF data, and often more notes added by editing apps. You never see them when you look at the photo. Anyone you send the file to can read them in seconds.

Where it was taken

Phones record the GPS position of every photo unless you have turned that off. The position is usually accurate to a few metres. A photo taken in your kitchen says where your kitchen is. Many cameras also record altitude and the direction the lens was pointing.

What took it

The make and model of the phone or camera are almost always there, along with the software version. Dedicated cameras often add the serial number of the body and of the lens. A serial number is the same in every photo that camera takes, so it can tie together photos you posted in different places under different names.

When

The date and time are stored to the second, usually with the time zone. Some files hold three or four different timestamps: when the photo was taken, when it was digitised and when it was last changed.

The hidden thumbnail

This is the one that surprises people. To show previews quickly, many cameras and apps store a small copy of the picture inside the file. Some editing apps change the main picture and forget to update the small copy. If you cropped someone out or blurred a number, the thumbnail may still show the original.

Newer phones go further. A “Motion Photo” or “Live Photo” saved as a single file has a short video attached after the picture. Portrait modes can attach a depth map.

Who

Editing software may add your name as the author, your copyright line, the name of your computer and a history of the edits. AI image tools often write the full prompt into the file.

How to look

Add a photo to Remove metadata. Before it changes anything, it lists what it found, grouped by how much each item gives away, and shows any hidden thumbnail as a picture. Nothing is uploaded: the file is read by your browser.

What cleaning does and does not do

Cleaning removes these notes and leaves the picture exactly as it was, with no loss of quality. Two things are kept on purpose: the colour profile, so colours look right, and the orientation, so the photo is not sideways.

It cannot remove what is visible. A street sign, a reflection in a window, a letter on the table or a recognisable view are all still there. Look at the picture itself before you share it.

Do apps do this for you?

Some do. Several large social networks strip most of this from photos you post publicly. Many messaging apps, email, cloud folders and file-sharing links send the file exactly as it is, and “send as document” or “original quality” options usually do too. If you are not sure, clean the file first: it takes a few seconds.