From spreadsheet exports to API-ready JSON
Marketing and finance teams still deliver CSV extracts. Converting locally lets engineers validate row counts and header spelling before seeding staging databases or GraphQL mutations.
Delimiter and encoding pitfalls
Excel locales sometimes emit semicolon separators or UTF-8 BOM prefixes. If headers look garbled, re-export as UTF-8 CSV or strip BOM characters in a text editor first.
Size limits
Very wide or long files run in browser memory. Beyond a few thousand rows, prefer streaming CLI tools—but for quick fixtures and contract tests, in-tab conversion is usually enough.