Turn API responses, Mongo exports, or Firestore dumps into CSV right in the browser. Nested keys flatten automatically so downstream tools can read the output.
Fastest way to get API data into a spreadsheet for review.
No install or download — runs on any browser, any OS.
Drop a .json file or paste JSON text. Nested objects flatten to dot-path columns automatically.
Pick a separator, copy to clipboard, or save a .csv file — all without leaving the browser.
Yes. Any valid JSON array or object-of-arrays pasted into the input pane is parsed on the fly.
No. Parsing and conversion run in your browser — the JSON never hits our servers.
Top-level nesting flattens cleanly. Arrays-of-objects inside a field are skipped with a warning — CSV can't natively represent a variable-length nested list in one cell.
Yes. Output is UTF-8 without BOM — ready for Python, Pandas, BigQuery, or Postgres ingestion.