Free JSON Schema Generator from Samples

Generate a JSON Schema from example JSON or typed field declarations. Infer nested objects and mixed arrays, then review the schema for your application.

Free · No AI API key required

How to use this tool

Create a starting JSON Schema from sample data or a concise list of typed fields. This is useful for documenting an API payload or beginning a validation contract.

  1. Paste actual JSON, or typed fields such as name: string and age?: integer.
  2. Run the generator to infer the schema.
  3. Review required fields, types and constraints before using it for validation.

Example to try

name: string, age?: integer, tags: string[] Or JSON: {"name":"Ada","tags":["developer"]}

Supported use and limits

A sample describes only the values it contains. The tool cannot infer every valid business case, allowed range or missing optional field. Review the result against your complete data contract.

Does the generated schema prove my API is correct?

No. It is an inferred starting point. Add application-specific restrictions and validate representative valid and invalid payloads with your chosen schema validator.

Free to use without an account. Submitted input is processed on our server. How Sarvam Tools works.