Free, runs entirely in your browser — no sign-up, no file upload to a server.
What does JSON Schema Generator do?
It generates a JSON Schema definition from a sample JSON document, inferring types and structure.
How do I use it?
Paste a representative sample of your JSON, and a matching JSON Schema is generated instantly.
Is my input sent anywhere?
Everything runs in your browser — nothing you type or paste is sent to a server.
How do I report a problem or request a feature for this tool?
Use the Contact / Feedback page — select "JSON Schema Generator" as the related tool so we know exactly which tool you mean, then describe the bug or the feature you'd like to see.