The core FindBugs engine (not the IDE plugin specifically) is hosted at FindBugs SourceForge . This is useful if you need to run it via command line or Ant. 3. Step-by-Step Installation Guide
For modern Java versions (JDK 11+), you should use SpotBugs , which is the "spiritual successor" and active fork of FindBugs. 2. How to Download the FindBugs Plugin netbeans findbugs integration plugin download
NetBeans FindBugs Integration Plugin: Download & Installation Guide The core FindBugs engine (not the IDE plugin
While built into older versions like NetBeans 8.2, it is notably absent or difficult to install in newer Apache NetBeans releases (11.3 and later). you should use SpotBugs