3-Heights PDF Merge Split Shell

3-Heights PDF Merge Split Shell is a command-line utility for combining PDF files and splitting PDFs into separate outputs. It is part of the 3-Heights PDF toolset from PDF Tools AG and is aimed at developers, system integrators, and IT teams that need scripted PDF processing in batch workflows.

The tool is typically used in server-side or automated environments where PDF assembly and document separation must run without a GUI. Its distinguishing trait is its shell-oriented design: it is built for command-line execution and integration into scripts, scheduled jobs, and larger document-processing pipelines.