Is my JSON data uploaded to a server?

No. The conversion runs entirely in your browser with JavaScript. Nothing is sent over the network, which makes the tool safe for sensitive data.

What JSON shape does the converter expect?

An array of objects, like a typical API response. Each object becomes a row and its keys become the column headers of the CSV file.

What happens to nested objects and arrays?

Nested values are serialized as inline JSON inside the cell, so no information is lost and the CSV stays valid for spreadsheets.

JSON to CSV Converter — Free Online Tool

Convert a JSON array to CSV instantly in your browser. Free, private and offline-friendly: your data never leaves your device.

Instant Private Zero cookies

Delimiter

Swap: CSV → JSON

JSON input

CSV output

Why convert JSON to CSV?

APIs return JSON, but spreadsheets, BI tools and non-technical teammates live in CSV. Paste a JSON array of objects above and get a clean CSV — one row per object, with headers taken from the keys — ready to open in Excel or Google Sheets.

How it works

The converter parses your JSON locally and writes standard CSV: fields containing commas, quotes or line breaks are quoted and escaped automatically. Nested objects and arrays are kept as inline JSON so the output always round-trips safely.

Frequently asked questions

Is my JSON data uploaded to a server?: No. The conversion runs entirely in your browser with JavaScript. Nothing is sent over the network, which makes the tool safe for sensitive data.
What JSON shape does the converter expect?: An array of objects, like a typical API response. Each object becomes a row and its keys become the column headers of the CSV file.
What happens to nested objects and arrays?: Nested values are serialized as inline JSON inside the cell, so no information is lost and the CSV stays valid for spreadsheets.