libiptcdata is a library, written in C, for manipulating the International Press Telecommunications Council (IPTC) metadata stored within multimedia files such as images. This metadata can include captions and keywords, often used by popular photo management applications. The library provides routines for parsing, viewing, modifying, and saving this metadata. The library is licensed under the GNU Library General Public License (GNU LGPL). The libiptcdata package also includes a command-line utility, iptc, for editing IPTC data in JPEG files, as well as Python bindings.