Domain-specific languages (DSLs) are a well-established approach to enable domain experts to specify, design and formalize various systems and processes with their domain-specific notations. While DSLs in industrial settings require reliable and high-quality language workbenches to develop them, the current rise to the web additionally requires DSLs to run in browsers and web environments.

Langium is a language workbench designed to develop textual DSLs and to run them in the web out-of-the-box. Thanks to its commercial-friendly open-source licence and hosted by the Eclipse Foundation, Langium is ready to develop high-quality DSLs for industrial use cases without vendor lock-in.

This talk presents Langium with its core features and focuses on developing high-quality DSLs for industrial needs with examples from industry and open-source activities. This talk shows how to integrate Langium-based DSLs into browser and desktop applications as well as into existing editors and IDEs like VS Code and Theia, and discusses the relationships of Langium to Xtext and EMF.