Metadata basics
What Is Image Metadata? EXIF, GPS, XMP, and IPTC Explained
Image metadata is information stored with an image rather than in its visible pixels. It can describe how a camera captured the file, where it was made, who created it, how it was edited, and how it may be used. A single image can contain several metadata systems at once.
- Reviewed
- Reading time
- 8 minutes
Metadata describes the file around the pixels
A JPEG or PNG is not only a grid of colors. Its container can also hold dimensions, color information, text, timestamps, camera settings, location coordinates, usage rights, editing history, and provenance records. Some fields are written automatically by a camera or phone; others are added by editing, cataloging, publishing, or AI-generation software.
Metadata may be embedded inside the image, stored in an external XMP sidecar, or kept in a digital asset management system. Copying, exporting, messaging, and social-media workflows can preserve, rewrite, or remove different parts of it.
The main metadata families
The names overlap in everyday software, but they serve different jobs.
- EXIF records technical capture details such as camera make and model, lens, exposure time, aperture, ISO, orientation, and capture date.
- GPS is commonly stored through EXIF location tags. Coordinates, altitude, and direction may identify where a photo was taken.
- XMP is an extensible packet that can carry editing, rating, workflow, rights, and application-specific properties. It can be embedded or stored as a sidecar.
- IPTC defines descriptive, administrative, and rights-oriented properties such as headline, caption, creator, credit, keywords, and copyright notice.
- Content Credentials are signed provenance records that can describe an asset, actions, and the organization or tool involved.
A representative camera file
The following values are illustrative, but they show how separate fields combine into a useful history.
- EXIF Make
- Canon
- EXIF Model
- Canon EOS R5
- Exposure
- 1/250 sec, f/2.8, ISO 200
- GPS
- 23.8103, 90.4125
- XMP Software
- Adobe Photoshop
- IPTC Creator
- Studio example
A public copy could reveal the capture location and creator even when neither appears in the visible image.
What metadata can and cannot establish
Metadata is useful evidence, not an infallible record. Fields can be incorrect, edited, copied, stripped, or unsupported by a particular parser. A camera name does not prove who pressed the shutter, and a missing GPS field does not prove the camera never recorded location elsewhere.
Inspect the original file when possible and distinguish an absent field from an unreadable one. For high-stakes authenticity work, metadata should be combined with source history, signed provenance, and appropriate forensic analysis.
Sources and further reading
- IPTC: What Is Photo Metadata?
Definitions for embedded and external photo metadata and its descriptive, rights, and administrative roles.
- IPTC Photo Metadata Standard
Current standard and field model for professional photo metadata.
- C2PA Content Credentials specification
Technical model for signed content provenance.