The software package Injavis (acronym for INteractive JAva VISualization) displays, analyzes, and manipulates particle simulation data. An emphasis lies on geometry and structural analysis as well as interactivity. The main input and output file format is .pos, which is a format developed specifically for Injavis and designed to be easily human readable and editable. The software is written in the Java programming language, which makes it transferable among operating systems without recompilation. Rendering and all analysis is performed using self-written code without external libraries. The software includes some newly developed analysis tools and algorithms. Requirement: up-to-date Java Runtime Environment (JRE).Run from the command line: java -Xmx4096m -jar injavis.jar More information is available on this webpage: https://engellab.de/injavis (Note: this version is an essentially unmodified code, but compiled with Java 8 for compatibility reasons.)