This document introduces Spring Tools 4, a new set of tooling for Spring developers. It summarizes that Spring Tools 4 is being developed to replace the existing Spring Tool Suite, as it is now lightweight, IDE-agnostic, and focuses on Spring Boot and annotation-based development. Spring Tools 4 is currently in public beta for Eclipse, Visual Studio Code, and Atom. It utilizes the new Language Server Protocol to provide Spring-specific functionality to multiple IDEs/editors through a shared language server.