Local JSON Workbench

Fix JSON locally.

Repair messy JSON, format it, and generate JSON Schema, TypeScript, Zod, Pydantic, and semantic mock data without network calls.

JSON Workbench screenshot
Local only

No AI, no telemetry, no remote APIs. Processing stays in the browser.

Repair first

Handles common JSON-like input problems and highlights failures in the editor.

Developer outputs

Copy schema, TypeScript, Zod, Pydantic, minified JSON, and mock data.