Use structured records
Good seed data should look realistic and stay structured. Separate street, city, region, postal code, country, phone, and coordinates instead of storing one large text blob.
Use JSON output for API fixtures and seed scripts
Use CSV export for spreadsheets and import tools
Keep country and region codes in separate fields
Avoid real personal addresses in shared development databases
Automate repeatable datasets
For repeated test runs, use the API to generate country-specific records and store snapshots in your test fixtures.
Generate multiple countries for international features
Use 100 to 1,000 records for pagination and search tests
Keep a small stable set for regression tests
Use larger random batches for performance checks