The short answer
EXIF (Exchangeable Image File Format) is the metadata standard cameras and phones use to record how a photo was taken: the device, the lens, the exposure settings, the timestamp, and often GPS coordinates. It lives inside the image file itself, invisible in the picture but readable by any tool that looks for it.
What EXIF typically contains
- Camera make and model — e.g., "Apple iPhone 15 Pro" or "Canon EOS R6".
- Lens and focal length — which lens was attached and its zoom position.
- Date and time — to the second, per the camera's clock.
- Exposure triangle — shutter speed, aperture, ISO, plus metering and flash.
- GPS coordinates — when location services are enabled for the camera.
- Orientation — so viewers rotate the image correctly.
- Software tag — which app last wrote the file.
A typical smartphone EXIF block holds dozens of fields, from white balance to sensor serial numbers on some DSLRs.
Where EXIF lives in the file
In JPEG files, EXIF sits in a dedicated APP1 segment right after the file signature — before any image data. PNG files usually carry metadata as tEXt/iTXt chunks or an embedded EXIF block (eXIf chunk); WebP can hold EXIF and XMP in RIFF chunks. Because it is structurally separate from pixels, software can read or strip it without touching the picture.
Why EXIF matters
- Photography — the fastest way to learn "how was this shot?" Check the settings behind a photo you admire.
- Organization — photo apps sort and search by capture date.
- Verification — capture metadata can support (or contradict) a claim about when and where a photo was taken.
- Privacy — GPS coordinates travel with the file unless removed. See our guide on photo location privacy.
What EXIF cannot do
- It is not proof. EXIF is editable by anyone with free tools; forged timestamps and camera fields take seconds to write.
- It is fragile. Messaging apps and social platforms strip it on upload — most photos online have none left.
- It is not a transcript. EXIF records the last save, not necessarily the first capture.
Treat EXIF as one layer of evidence in a bigger picture — exactly how the PictureMatters methodology treats it.
Check your own photos
The free PictureMatters EXIF viewer reads every EXIF field from your photo in seconds — no account, no install, and the file is deleted automatically after analysis.