How to use JSON to Zod
Zod schemas validate unknown data at runtime and can also produce TypeScript types. XXF infers nested objects, arrays, primitive values and simple unions from one JSON example, then returns a schema and its inferred Root type.
Inference cannot decide business constraints such as valid email formats, numeric ranges or whether a missing property is optional. Treat the output as a reviewable foundation rather than a final security boundary.
A reliable workflow
- Paste a representative JSON value
- Generate the Zod schema and review every inferred branch
- Add optional, nullable, format and range rules required by the real contract
Worked example
Generate a schema from the included account-preferences object
{"email":"[email protected]","age":28,"preferences":{"darkMode":true},"tags":["dev"]}The output creates nested z.object calls with string, integer, boolean and string-array validators. Email format, age limits and optional fields still need deliberate domain rules
When this tool helps
- Create a parser for an external API response
- Validate imported configuration
- Prototype form or webhook payload schemas
Accuracy and safety notes
- Empty arrays become arrays of unknown values because no item evidence exists
- A null sample becomes z.null and needs manual expansion when other values are possible
Frequently asked questions
Does XXF upload or store my data?+
No. The conversion runs locally in your browser. Your input is not sent to XXF, stored on a server or used for training.
Is the generated schema a replacement for review?+
It is a strong starting point derived from one sample. Review optional fields and domain-specific constraints before production use.