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Flatten Nested JSON to CSV
Turn nested JSON arrays and objects into spreadsheet-ready CSV with clear dotted column names.
Problem
An API export contains nested objects that do not fit neatly into Excel, Google Sheets, or SQL import tools.
What to do
Flattening converts nested keys into stable columns. That makes API responses easier to audit, sort, filter, and hand off to people who work in spreadsheets.
- 1Paste or drop the JSON array.
- 2Flatten nested fields into CSV columns.
- 3Review headers, copy the CSV, or download the converted file.
Use the browser tool
JSON → CSV converts a JSON array of objects into clean, spreadsheet-ready CSV. It flattens nested objects to dotted columns, lets you choose the delimiter, quote style, boolean and null formatting, and header casing — then copy or download the result. A fast, private way to get API responses into Excel or a database.
People also ask
- How do I convert JSON to CSV?
- Paste your JSON into the input panel (or drop a file), adjust the options if needed, then copy or download the CSV from the output panel. The conversion happens instantly in your browser.
- Is my data uploaded or stored anywhere?
- No. Everything runs locally in your browser — your data is never uploaded to a server. Nothing is sent to a server, so it's safe to use with private or sensitive data.
- Is JSON to CSV Converter free?
- Yes — it's completely free with no account, no sign-up, no watermark, and no daily usage limits.