Making a safe sample for an online converter

Use invented values that preserve the real data's structure and edge case. Keep relevant field names, types, separators, and nesting while replacing names, addresses, IDs, and secrets.

Test a tiny sample first and verify its output against an independent expectation. Do not assume a converter is appropriate for confidential production files without understanding where processing occurs and how data is handled. If a safe sample reproduces the issue, share that sample instead of the original.

Which feature of the data must the sample retain?