JSON to CSV Converter

Convert JSON to CSV and CSV to JSON instantly. Free online converter with auto-detection, no signup, no upload. Runs in your browser.

Preparing private browser tool…

Your file will stay on this device.

Related tools

Color Picker

Pick colors and convert between HEX, RGB, HSL formats instantly. Copy color codes with one click. Free online tool.

File Hash

Generate MD5, SHA-1, SHA-256 checksums from files in your browser. Verify file integrity without uploading. Free and private.

Base64 Encoder

Encode and decode Base64 strings instantly. Supports text and file input. Free online tool, no upload, runs in your browser.

Text Case Converter

Convert text between UPPER, lower, Title, camelCase, snake_case, and more. Free online tool with one-click copy.

Frequently asked questions

Does JSON need to be an array?
Yes, JSON to CSV requires an array of objects. Each object becomes a row; each unique key across all objects becomes a column.
How are nested values handled?
Nested objects and arrays inside a cell are serialized back to JSON and wrapped in quotes so the CSV stays valid.
Does it handle commas and quotes in values?
Yes. Values containing commas, quotes, or newlines are wrapped in quotes with internal quotes escaped as "" per RFC 4180.
Is my data uploaded anywhere?
No. All parsing and formatting runs in your browser with plain JavaScript. Your data never leaves your device.