DUL Data Utility Labs

JSON and CSV - Private browser tool

JSON Schema Generator

Generate a starter JSON Schema from sample JSON for validation, API docs, and data contracts.

Use the tool Read FAQ 
[
  {"id":1,"name":"Ada Lovelace","team":"Data","active":true},
  {"id":2,"name":"Grace Hopper","team":"Platform","active":false}
]

JSON Schema Generator

Private, browser-based, free to use.

What this tool helps you do

Generate a starter JSON Schema from sample JSON for validation, API docs, and data contracts. Paste your data, run the tool, copy the result, and move on. The core workflow stays on one focused page.

Best use cases

  • Convert or clean data before importing it into spreadsheets, BI tools, databases, or internal apps.
  • Debug API payloads, logs, tokens, encodings, regular expressions, and text transformations.
  • Create lightweight examples for documentation, tests, tutorials, customer support, and team handoffs.

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JSON Schema Generator FAQ

Is the schema production-ready?

It is a strong starter schema. Review required fields and edge cases before shipping.

Can it infer arrays?

Yes. Array item types are inferred from the first item.

Can it infer optional fields?

It marks observed object keys as required. Adjust optional fields manually.