iText RUPS

iText RUPS is a graphical utility designed for inspecting the internal structure of PDF documents. Built with a Java Swing interface, the application allows developers and document analysts to navigate through PDF objects, streams, dictionaries, and arrays in a hierarchical tree view. Users can examine page contents, inspect font metrics, and view low-level syntax elements that make up a PDF file. This tool is intended for debugging PDF generation processes or troubleshooting document corruption issues by exposing the raw object relationships.

The application operates primarily as a desktop viewer for PDF internals on Linux systems. It requires a Java runtime environment to execute its graphical user interface. While it provides deep visibility into document architecture, it does not function as a standard document reader or an editing suite for modifying text and layout within PDF files.