Paste one representative JSON object from an API response, fixture, or configuration file.
Local JSON to Zod generator
Turn a JSON sample into a Zod schema.
Paste an API response or config sample and get a readable Zod runtime schema in your browser.
* The JSON is parsed locally. Nothing is uploaded, stored, or sent to an API.
Local JSON to Zod generator
From sample payload to runtime validation
Choose a schema name and generate nested Zod objects for the sample shape.
Review the inferred schema against more than one response before shipping it as a contract.
FAQ
What can ZodBox infer?
Does ZodBox upload my JSON?
No. JSON.parse and code generation run in this browser tab.
Does one sample describe every API response?
No. The output describes the sample you provide. Compare it with other responses before treating it as a complete contract.
How do I validate data with the output?
Import the generated schema and call ApiResponseSchema.parse(data) or safeParse(data), replacing the name with your schema name.