... builds on the IPTC Photo Metadata Standard and its technical implementations IIM and XMP, and references to Exif. The images are processed this way:
A key element of this service is ExifTool, a software developed by Phil Harvey, to retrieve a rich set of metadata fields in different technical formats or to embed such a set into image and video files.
The Get-IPTC-Metadata open source project is available at Michael Steidl's Github repository.
Drag the IPTCpmd (IPTC Photo Metadata) on the right to the toolbar of your browser. (If you have IPTCpmd already: delete that one first, then drag and drop the new one.)