API output is JSON, but a spreadsheet app wants rows and columns. Filemorph flattens a JSON array into a CSV file on your iPhone, ready to open anywhere.
An API response, an app's exported data, a JSON log file: useful data, wrapped in a format spreadsheets do not read directly. Filemorph converts a JSON array of objects into a CSV file, with each object becoming one row and each field becoming one column.
Filemorph collects every field name found across the JSON array to build a consistent set of columns, then writes each object as a row, quoting fields as needed so commas or line breaks inside a value do not break the file. Objects missing a field that others have simply get an empty cell there.
In the app: Convert → JSON → CSV.
Spreadsheets read CSV natively and JSON not at all, so flattening API or app output into CSV is what makes it usable in Excel, Numbers or Sheets for sorting, filtering or a quick chart. It is the fastest path from raw data to something a non-developer can open.
Yes. Unlike web converters that upload your files to a server, Filemorph converts every file locally using Apple's frameworks. Nothing leaves your device, and it works with no internet connection. This operation is part of Filemorph Pro ($29.99/year, 7-day free trial on monthly and annual plans).
It works best on a flat array of objects, one level deep. Deeply nested fields flatten to their JSON text representation in a single cell rather than expanding into further columns.
The CSV includes every field seen across the array as a column; rows missing a given field just have an empty cell there.
JSON to CSV is part of Filemorph Pro. It pairs with CSV to JSON for the reverse direction.
On-device, no upload. Plus 300+ more file operations.
Download on theApp Store