Schema generation for structured outputs

JSON Schema Generator

Generate JSON Schema and structured-output response_format wrappers from example JSON.

Example JSONStrict SchemaStructured Outputs

Schema workbench

Turn example JSON into a structured-output schema.

Example JSON

102 chars

Strict required fields

Structured output

OpenAI response_format wrapper.

{
  "type": "json_schema",
  "json_schema": {
    "name": "generated_schema",
    "strict": true,
    "schema": {
      "$schema": "https://json-schema.org/draft/2020-12/schema",
      "type": "object",
      "properties": {
        "title": {
          "type": "string"
        },
        "score": {
          "type": "number"
        },
        "tags": {
          "type": "array",
          "items": {
            "type": "string"
          }
        },
        "published": {
          "type": "boolean"
        }
      },
      "required": [
        "title",
        "score",
        "tags",
        "published"
      ],
      "additionalProperties": false
    }
  }
}

Capabilities

What this tool handles

Use JSON Schema Generator to check the input, tune the settings, and copy a clean output.

Schema Inference

Infer strings, numbers, arrays, objects, and booleans.

LLM Output Format

Generate OpenAI-style response_format JSON.

Strict Mode

Require fields and disable additional properties.

Workflow

Run it in three steps

Generate structured-output schemas from example JSON.

Paste JSON

Add a representative output example.

Choose Strictness

Mark fields required and block extra properties.

Copy Schema

Copy the response_format wrapper for LLM APIs.

Good for

Common jobs this tool supports

Schema InferenceInfers common JSON types

LLM ReadyResponse format wrapper

Strict ModeRequired fields and no extras

Copy JSONCopy schema instantly

FAQ

Answers before you run it

Practical notes about output, privacy, and common settings.

It generates JSON Schema plus an OpenAI-style response_format wrapper for structured outputs.

Use next

LLM JSON RepairRepair model output before parsing.JSON Formatter and ValidatorValidate the JSON you generated.OpenAPI Swagger ViewerView OpenAPI and Swagger specs JSON VisualizerVisualize JSON as tree and graph