Sample JSON Generator

Sample JSON — also called mock data, test fixtures, or seed data — is fake-but-realistic JSON used in place of real production data during development. The use cases are everywhere: seeding a fresh database for QA, populating a frontend list view before the backend API exists, writing unit tests that don't depend on network calls, building a CMS preview environment, recording API contract examples in OpenAPI docs, or simply showing the shape of your API to a teammate without exposing real customer records. Manually typing out 100 records of plausible test data is tedious; copying real data risks leaking PII. A generator threads the needle. This one builds JSON arrays of records with configurable field types in your browser. Format the result with the JSON Formatter, or convert to CSV for spreadsheet handoff with the CSV/JSON Converter.