After a few month since the last updates there are now new releases of the Node.js module and the vscode extension with some cool new features. antlr4-graps now can generated sentences from your grammar, that is, random input that always parses and shows the language your grammar supports. This can be used for demonstration purposes, checks against other parser implementations or just to see if your grammar does the right thing. Another new feature is the grammar formatter, which supports a large number of options and comes with a powerful alignment implementation. The antlr4-vscode extension makes all that available in Visual Studio code (see also the vscode market place).