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Eclipse JDT Language Server vs Language Support for Java(TM) by Red Hat: catalog facts
Eclipse JDT Language Server	Language Support for Java(TM) by Red Hat
Free Free and open source under the Eclipse Public License 2.0.	Free Free to install from the Visual Studio Marketplace.
Windows, macOS, Linux	Windows, macOS, Linux
Java IDE features in any LSP-capable editor Backed by the Eclipse JDT compiler tooling	Code completion, linting, formatting and refactoring for Java Maven and Gradle projects recognised automatically
Needs an editor with LSP support to be useful Setup in some editors takes manual configuration	Only works inside Visual Studio Code Other platforms need a separately installed JDK 25 or newer
Downloadable app	Downloadable app
Open source	Closed source
License: EPL-2.0	License not stated
No account needed	No account needed
Works offline	Not stated if it works offline
Official website Full listing and sources Checked October 2, 2026	Official website Full listing and sources Checked October 1, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.