How to Convert JSON to CSV
CSV is the most portable tabular format: every spreadsheet, database, and BI tool reads it. This guide explains how JSON becomes CSV and how nested data is handled.
Why convert JSON to CSV?
JSON is ideal for APIs and programs, but analysts, finance teams, and spreadsheet tools want rows and columns. CSV is the lowest-common-denominator format that imports everywhere.
How nesting is flattened
An object like:
{ "id": 1, "user": { "name": "Asha", "city": "Jalaun" } }
becomes three columns: id, user.name, user.city. This dot-notation flattening works to any depth, so deeply nested API responses turn into a flat table you can sort and filter.
How arrays are handled
Wrapper objects
If your JSON is wrapped, like {"data": [ ... ], "meta": { ... }}, the converter finds the records array automatically (it knows common keys like data, results, items, rows).
CSV vs XLSX
CSV is universal, but Excel can reformat CSV values on open (stripping leading zeros, turning long numbers into scientific notation). If your data has IDs, ZIP codes, or long numbers, download as XLSX instead: it writes those as text cells so they survive exactly.