Generate test fixtures from a schema
Infer a schema from sample JSON, then generate deterministic mock records in the format you need.
Step 1
Start from a representative JSON sample
Use a sample that covers the fields and nesting you actually care about in tests. A realistic example gives the schema generator enough shape information to be useful.
Step 2
Infer a JSON Schema from the sample
Paste the sample into JSON to Schema and capture the field names, required properties, and nested structures it infers. Clean up anything obviously too loose before you use it as a fixture template.
Infer with JSON to Schema →Step 3
Generate seeded fixture data
Feed the field shapes into Mock Data Generator and use a fixed seed so reruns stay deterministic. Export the results in the format your tests expect, whether that is JSON, CSV, SQL, or NDJSON.
Generate fixtures →Step 4
Profile the generated output before using it
Open the generated fixtures in Data Explorer if you want a quick check on null rates, duplicates, and value spread. This catches weak fixture sets before they turn into misleading tests.
Profile fixtures in Data Explorer →