What is actually in there
EXIF is a metadata block written into the file alongside the image data. Cameras and phones fill it in automatically and most people never see it.
A typical phone photo carries: GPS latitude and longitude, often to within a few metres, plus altitude; the exact date and time including timezone; camera make, model, and sometimes serial number; lens, focal length, aperture, shutter speed, and ISO; orientation; and the software that last wrote the file.
Some cameras add a unique body serial number to every frame, which links every photo you have ever published from that camera to every other one.
Why it matters more than people expect
Location is the obvious risk. A photo posted from home, from a child's school, or from a workplace carries the coordinates of that place. Several photos together map a routine.
Timestamps are the underrated one. They establish where you were and when, which matters for anyone with a reason not to be tracked — and they also quietly contradict a claim about when something happened.
Serial numbers create linkage. Two accounts you thought were unconnected can be tied together by the camera body that took photos on both.
Most major social platforms strip EXIF on upload, which has trained people to assume it is handled. Forums, marketplaces, direct file transfers, email attachments, and personal websites frequently do not.
Re-encoding removes it
The simplest reliable way to strip metadata is to decode the image and encode a fresh file. The new file is written from pixel data alone, and the metadata block is not carried across because nothing carries it.
That is what happens when you compress a photo or convert its format. The output is a new JPEG containing your image and nothing else — no GPS, no serial number, no timestamp.
It is a side effect rather than a dedicated feature, but it is a thorough one. There is no partial removal to get wrong and no chance of a field being missed, because no fields are copied at all.
Screenshotting also works, with a cost
Taking a screenshot of a photo produces a new image with no inherited metadata, which is why it is a common piece of advice.
The cost is real though. You get the resolution of your screen rather than the photo, cropped to whatever was visible, and usually as a PNG that is larger than the original JPEG was. For a quick share it is fine; for anything you care about it is a poor trade.
Re-encoding keeps the full resolution and produces a smaller file. It is better on every axis except how quickly you can think of it.
What re-encoding does not remove
Information visible in the image itself is not metadata and does not go anywhere. A street sign, a house number, a reflection in a window, a visible screen, a name badge, or a distinctive view from a window are all still there.
Location can often be inferred from content alone with less effort than people assume. Removing EXIF raises the bar; it does not make a photo anonymous.
Invisible watermarking, where it exists, is embedded in the pixels rather than the metadata and survives re-encoding by design.
Check before you assume
On Windows, right-click the file, choose Properties, and open the Details tab. On macOS, open the file in Preview and choose Tools then Show Inspector. Both show GPS coordinates if present.
Do this on a photo you have already shared somewhere. It is the fastest way to find out whether the platform you used strips metadata or not, and the answer is often surprising.
If you are about to publish a batch, check one from the batch rather than assuming they are all the same — photos from different sources in the same folder frequently differ.
Turn it off at the source
Both major phone platforms let you stop location being recorded in the first place. On iOS it is under Settings, Privacy and Security, Location Services, Camera — set it to Never. On Android it is a toggle inside the camera app's own settings, usually called location tags or store location.
That prevents the coordinates being written at all, which is stronger than removing them afterwards and means you cannot forget.
The trade-off is losing the map view in your photo library and the ability to search photos by place. Many people want that feature, which is why it defaults on. If you do, leave it on and strip metadata at the point of sharing instead.
A habit worth having
Treat any photo leaving your device for a public destination as needing a pass: compress or convert it, which strips metadata and reduces the file size at the same time.
For photos going to people you trust, it matters much less, and keeping EXIF is genuinely useful for your own archive.
The important thing is knowing which is which, rather than assuming every service handles it for you. Enough of them do that the ones that do not are easy to overlook.
Frequently asked questions
Do photos contain my location?
Phone photos usually do, as GPS coordinates in the EXIF block, often accurate to within a few metres. You can check in Windows file properties or macOS Preview.
Does compressing a photo remove EXIF data?
Yes. Re-encoding writes a new file from the pixel data alone, so the metadata block is not carried over at all.
Do social platforms strip metadata?
The major ones generally do. Forums, marketplaces, email attachments, and direct file transfers frequently do not.
Does taking a screenshot remove metadata?
Yes, but you lose resolution and usually gain a larger PNG. Re-encoding keeps full resolution and produces a smaller file.
Can I stop my phone recording location at all?
Yes. On iOS set Location Services for Camera to Never; on Android turn off location tags in the camera settings. That prevents it being written in the first place.
Is a photo anonymous once EXIF is removed?
No. Anything visible in the image — signs, reflections, house numbers, distinctive views — is still there and is often enough on its own.