JSON

vscode-json-language-server

JSON editing with schema-aware completions, validation, hover, formatting, and document symbols.

Delivery

bundled npm server

Activation

.json and JSON-with-comments configuration files

Capabilities

Validates structure, required fields, value types, and schema-defined enum values.

Completes known package, TypeScript, ESLint, and tool configuration fields when schemas match.

Formats configuration files and shows document symbols for navigation.

Keep common config files at expected names so schemas can match automatically.

Use comments only in JSONC-aware files.

Open the repository root for package and tool context.

Generic completions usually mean no schema matched the file.

Validation failures can come from JSON comments in strict JSON files.

Packaging errors often involve missing npm server dependencies.