Where do the sample values come from?

The page fills each field from a fixed local pattern. It does not call a language model or upload the field list.

Which types are available?

string, number, boolean, email, uuid, and iso-date. An unknown type is stored as a string.

JSON Mock Data Generator | DevTools Pro

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JSON mock data

One field per line, as name:type. Types are string, number, boolean, email, uuid, and iso-date. Values are generated in this browser from a fixed pattern, not from a remote model.

Fields

Records

JSON Mock Data

Create a small JSON array from field names and types. The values follow a fixed local pattern so the same input can be regenerated.

Common Use Cases

•Draft a fixture for a form with name, email, and a boolean
•Produce twenty or fewer rows for a local preview

Who Benefits from This Tool

•Developers who need sample JSON without an external service

Frequently Asked Questions

Is the output random each visit?

The generator uses a fixed numeric pattern, so the same field list and count produce the same values.

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