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You take a photo of your new bicycle outside your front door and send it to a stranger who wants to buy it. The photo looks harmless. The file may contain something the picture does not show: the latitude and longitude of where you were standing.
This is not a hack and it is not rare. It is a standard feature of how cameras save files. Most people never see it, which is exactly why it is worth ten minutes of attention.
What EXIF actually is
EXIF stands for exchangeable image file format. It is a block of small notes the camera writes inside the photo file, next to the pixels. Opening the picture shows only the pixels. The notes sit behind them until something reads them.
| Field | Example | Why it matters |
|---|---|---|
| Camera or phone model | Pixel 8, iPhone 15 | Shows what device you own |
| Date and time taken | 2026-10-04 18:42 | Shows when you were there, to the minute |
| Exposure settings | 1/120 s, f/1.8, ISO 100 | Harmless, useful for photographers |
| Orientation | Rotated 90° | Tells apps which way is up |
| GPS position | Latitude and longitude | Shows where you were, to a few metres |
| Software | Editor name and version | Shows what you edited it with |
Typical fields in a phone photo. GPS is only present when the camera app has permission to use your location.
How precise is the location?
Coordinates are written as decimal degrees, and each extra decimal place sharpens them by a factor of ten. A change of 0.0001 degrees of latitude is about 11 metres on the ground.
Phone photos usually record several decimal places, so the point on the map can be a particular house or doorway, not just a neighbourhood.
A phone with a good view of the sky typically fixes its position within a few metres. That is enough to tell your house from your neighbour's.
When the data travels, and when it does not
Whether EXIF survives depends on how the picture is shared. Many large social apps remove location from what other people can see when they display a post, but this is a policy of each app, it can change, and it does not cover every way of sharing. Treat it as something to check, not something to assume.
| How you share | Does the original file go? | Usual risk |
|---|---|---|
| Email attachment | Yes, the file as it is | Metadata travels |
| Messaging app, sent as file or document | Yes, usually | Metadata travels |
| Messaging app, sent as a photo | Often re-compressed | Varies by app |
| Upload to your own website or a marketplace | Often yes | Check first |
| Screenshot of the photo | No, it is a new image | Original EXIF is gone |
A general guide, not a promise. Apps change how they handle photos, so check a sample before you rely on it.
Check a photo in three steps
- 1Open it in the viewerChoose the photo. Nothing is uploaded: the file is read in your browser.
- 2Look for GPSIf you see latitude and longitude, the photo knows where it was taken.
- 3Remove it and save a clean copySave a version without the metadata and share that one instead of the original.
Turn the problem off at the source
- In your camera app's settings, switch off location tagging, or give the camera app location access only when it is needed.
- For one-off sharing, send a clean copy made with an EXIF remover instead of the original.
- Keep the original for yourself. The metadata is useful when you search your own library by place or date.
- Remember that removing the data from a photo does not remove what the picture shows: a street sign or house number is still there.
Removing metadata also goes well with shrinking the photo. A smaller picture shared online loads faster, and here is why a 4 MB photo is often really a 400 KB one.
Questions people ask
What is EXIF data?
A set of notes stored inside a photo file: camera model, date and time, exposure settings and, if location was on, GPS coordinates. It is invisible when you look at the picture but can be read by software.
Does every photo contain my location?
Only if the camera app was allowed to use your location when the photo was taken. Photos from the web, screenshots and many edited images carry no GPS data.
How accurate is the GPS in a photo?
Usually within a few metres on a phone with a clear view of the sky. Each decimal place in the coordinates is ten times more precise, and five decimals point to about one metre.
Does taking a screenshot remove EXIF?
A screenshot is a new image, so the original photo's camera and location notes are not copied into it. It also reduces quality, so for a clean copy of the real photo, an EXIF remover is better.
Is removing EXIF safe for the picture?
Yes. The pixels are not changed. Only the hidden notes are dropped, so the photo looks the same.