JSON to JSON Schema
Infer a JSON Schema from a representative JSON example
ABOUT
What is JSON to JSON Schema?
Generate a draft JSON Schema from a JSON object, including property types, arrays, required fields, and nested objects. Use it to start validation work, then refine constraints that an example cannot reveal.
ABOUT US
Small tools, built for the web.
Utilities that run entirely in your browser. No install, no signup, and your data never leaves your machine.
FAQ
Questions, answered.
Does the generated schema know which fields are optional?＋
No. A single example makes every observed property required. Review the required list and remove fields that are optional in real data.
Does it infer formats such as email or date-time?＋
No. It infers broad JSON types. Add format, pattern, minimum, maximum, and other business constraints manually.
Is the sample JSON uploaded?＋
No. Schema generation runs entirely in your browser.