JSON Schema Generator

The JSON Schema Generator inspects a sample document and produces a JSON Schema that describes its structure, types, and required fields. It gives you a solid starting point for validation instead of writing a schema by hand. Generate the draft, refine the constraints you care about, and use it to validate future data.

• Infers types for every property from a sample document
• Marks observed keys as required and captures object structure
• Describes arrays by inferring the schema of their items
• Targets a modern JSON Schema draft for broad tool compatibility
• Handles nested objects and arrays to any depth
• Editable output so you can tighten constraints after generation

1. 1

   Paste a representative sample

   Provide a JSON document that reflects the shape of the data you want to describe.

2. 2

   Generate the schema

   The tool infers types, required fields, and nested structure into a draft schema.

3. 3

   Refine the draft

   Adjust required fields, formats, and constraints to match your real rules.

4. 4

   Use it for validation

   Pair the schema with the JSON Schema Validator to check future documents.

• Bootstrapping a validation schema from an existing API response
• Documenting the expected shape of a config file
• Generating a contract for a payload before writing tests
• Creating a starting schema for code generation tooling
• Standardizing data structures across a team from a known example