Tinker with PDF files. Download the JAR file for your OS (e.g. Windows) and double click on it.
You will need at least Java 21 (e.g. https://adoptium.net/temurin/releases/?os=any&arch=any&version=21) to run this Desktop-App.
The latest releases of PDF Tinkerer can now be found on:
https://gitlab.com/gjwu/pdf-tinkerer/-/releases