AI JSON Schema

Define fields and generate JSON Schema plus OpenAI structured-output config. All processing stays on your device.

Builds draft 2020-12 schemas with strict object rules suited for LLM structured outputs. Generated locally — your data stays private.

Property 1
Output

Schema output appears here

Define fields on the left, then press Generate to create JSON Schema, OpenAI, and example JSON.

About AI JSON Schema

Design JSON schemas for structured LLM outputs and generate provider-ready configuration. Define fields and types, then copy a schema that enforces reliable, parseable responses.

Features

  • Define fields, types, and requirements
  • Generate valid JSON Schema
  • Produce OpenAI structured-output config
  • Infer schemas from sample JSON

How to use

  1. 1Add the fields and types you need.
  2. 2Mark required fields and descriptions.
  3. 3Copy the generated schema and config.

Frequently Asked Questions

What is JSON mode or structured output?
It constrains an LLM to return JSON that matches a schema, making responses reliable and easy to parse.
Is the schema OpenAI-ready?
Yes. The tool produces configuration formatted for OpenAI structured outputs alongside standard JSON Schema.
Can I build a schema from existing JSON?
Yes. Import sample JSON to infer fields and types as a starting point.

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