Spring Tools 4 plugin is also known as Spring Tool Suite 4. To install Spring Tools 4 plugin in Eclipse, go to Eclipse Marketplace and search for Spring Tools 4 plugin.
If you don't have eclipse ide, download the latest version of Eclipse IDE for Enterprise Java Developers in https://www.eclipse.org/downloads/packages/. Latest version is Eclipse JEE 2020 12. Alternatively you can directly download a dedicated Spring Tool Suite IDE.
Spring Tools 4 Plugin Install
In Help Menubar choose the Eclipse Markerplace Menu. It will open a Eclipse Market Place Wizard.
In Market Place Wizard/dialog Search for Spring Tools 4 plugin and hit enter key.
Select Spring Tools 4 and click install.
You can select the features that are marked as required and can ignore others if not needed.
Accept license agreement and wait until the installation progress completes.
After installation completes, a restart dialog will popup. Click restart to complete the plugin installation.
Now you can start with developing a Spring Boot Project.