What is EXIF data?
EXIF data is the information a camera or phone writes into a photo file alongside the picture: the device, the settings, the date and time, and often the GPS location. You can't see it in the image, but anyone with the original file can read it.
A standard from the camera industry
EXIF (Exchangeable Image File Format) was introduced in 1995 by JEIDA, the Japan Electronic Industries Development Association, so that digital cameras from different makers could record shooting details in the same way. It is now maintained by CIPA and JEITA; the current version, EXIF 3.0, arrived in 2023 and added proper UTF-8 text. The format borrows its structure from TIFF: numbered tags, each with a type and a value, grouped into directories called IFDs.
Phones adopted the same standard, which is why a photo from almost any device carries roughly the same set of fields.
What's actually in it
Here are the tags that matter most, with example values of the kind you would see from a phone. Open your own photo in the viewer to see the real list.
| Tag | Example value | What it tells a stranger |
|---|---|---|
Make, Model | Apple, iPhone 15 Pro | Device you own |
DateTimeOriginal | 2026:05:14 08:42:10 | When you were there |
OffsetTimeOriginal | +02:00 | Your time zone |
GPSLatitude / GPSLongitude | 48° 51′ 30″ N, 2° 17′ 40″ E | Exact location |
GPSImgDirection | 212° | Which way you faced |
FNumber, ExposureTime, ISO | f/1.8, 1/250 s, ISO 200 | Camera settings |
FocalLength, LensModel | 6.9 mm, main camera | Lens used |
BodySerialNumber | string of digits | Links photos to one camera |
Artist, Copyright | Your name | Identity |
Software | App name and version | Editing history |
Orientation | Rotate 90 CW | Nothing personal |
Alongside EXIF, many files also carry XMP (an XML packet written by Adobe apps and phone editors, which can repeat the GPS and add edit history) and IPTC (captions, credits and written place names used by news agencies). The differences are laid out in EXIF vs XMP vs IPTC.
Where it lives inside the file
A JPEG isn't one lump of data. It's a sequence of blocks, each starting with a two-byte marker. The picture is only one of them, and metadata sits in blocks near the start. That's why metadata can be removed cleanly without touching the image, and why a screenshot of a photo has none of it.
Inside a JPEG: where the metadata sits
Each bar is one block of the file, in order. Width is on a log scale so small blocks stay visible. Tap a block to see what it holds.
Application segment 1. Cameras put EXIF here: make, model, exposure, dates, GPS and a small thumbnail. A second APP1 often holds XMP, an XML packet written by editors like Lightroom.
File size: 2.31 MB · metadata in original: 20.6 KB
Why it matters for privacy
The concern isn't aperture or ISO. It's the handful of fields that point to a person or a place. A GPS tag on a photo taken in your living room is your home address. A camera serial number connects an anonymous account to photos posted under your real name. Timestamps across a series of photos sketch out a routine.
In 2012 the location of antivirus founder John McAfee, who was avoiding the authorities in Belize, was revealed after a journalist's photo of him was posted online with GPS coordinates still embedded; the case is widely cited in journalism training for exactly this reason.
Can EXIF data be trusted?
Not blindly. EXIF is ordinary data that any EXIF editor can rewrite, and some apps overwrite dates when they save. Verification teams treat it as one clue among many and check it against what the picture shows. Night shots are a favourite cross-check: a thin crescent in the sky on a date that had a full moon exposes an edited timestamp (ahaboo has a narrated explainer on why the Moon has phases).
How to see and remove it
- See it: drop a photo into the EXIF viewer. On an iPhone, swipe up on a photo in the Photos app; on Android, tap the ⓘ or "Details" in your gallery; on Windows, right-click → Properties → Details; on a Mac, open in Preview → Tools → Show Inspector.
- Remove it: use the metadata remover for a verified-clean copy, or follow the built-in methods for each device.
- Find a location: the photo location finder reads GPS and opens it on a map.
Questions people ask
What does EXIF stand for?
Exchangeable Image File Format. It was created by the Japanese electronics industry association JEIDA in 1995 and is now maintained by CIPA and JEITA. Version 3.0 was published in 2023.
Does every photo have EXIF data?
Photos straight from a phone or camera almost always do. Screenshots, images downloaded from social networks and most images made in design tools have little or none.
Is EXIF data dangerous?
Mostly it is harmless technical detail. The risky parts are GPS coordinates, names, serial numbers and precise timestamps, because they can reveal where you live, who you are and your routine.
Can EXIF data be changed or faked?
Yes. It is ordinary data inside the file, so any EXIF editor can change it. That is why investigators treat it as a lead and cross-check it against other evidence.
Do PNG and HEIC files have EXIF?
HEIC files from iPhones carry full EXIF including GPS. PNG added an official eXIf chunk in 2017, but most PNGs are screenshots or exports that carry little metadata. WebP and AVIF can carry EXIF and XMP too.