JSON to CSV / CSV to JSON Converter

Free online JSON to CSV and CSV to JSON Converter. Transform JSON arrays and records into Excel-ready CSV files with custom delimiters and complete browser privacy.

JSON to CSV / CSV to JSON Converter

Export and transform records between JSON arrays and CSV tables

Presets:

Delimiter:

Flatten Nested Keys

JSON Input

26 lines • 452 chars

Converted CSV

4 lines • 191 chars

id,fullName,email,tier,mrr,isActive
1001,Sarah Connor,[email protected],enterprise,599,true
1002,John Doe,[email protected],pro,49,true
1003,Elena Rostova,[email protected],starter,19,false

Developer Scenario: Exporting API User Records to an Excel Spreadsheet

A product manager extracts user analytics data from a REST endpoint as JSON and converts it to a comma-separated table for spreadsheet analysis.

Input JSON Array	[ { "id": 101, "name": "Alice Smith", "email": "[email protected]", "plan": "pro", "mrr": 49.00 }, { "id": 102, "name": "Bob Jones", "email": "[email protected]", "plan": "enterprise", "mrr": 299.00 } ]
Converted CSV	id,name,email,plan,mrr 101,"Alice Smith","[email protected]","pro",49.00 102,"Bob Jones","[email protected]","enterprise",299.00

💡 The resulting CSV opens seamlessly in Microsoft Excel, Google Sheets, or can be ingested into SQL via COPY commands.

How to use JSON to CSV / CSV to JSON Converter

1
Paste your JSON array of objects or raw CSV table into the editor, or choose from structured sample presets.
2
Select the conversion direction: "JSON to CSV" or "CSV to JSON".
3
Choose your preferred delimiter (Comma `,`, Semicolon `;`, or Tab `\t`) and whether to flatten nested object keys.
4
Copy the converted data or download it as a .csv or .json file ready for Excel, Google Sheets, or database imports.

Why use this tool?

Nested Object Flattening

Automatically flattens deep nested JSON objects into dot-notation column headers (e.g. "address.city") for clean relational tabular display.

Multiple Delimiter Support

Export with commas, European semicolons, or tabs (TSV) to match regional Excel locale preferences.

Zero Latency & 100% Privacy

Your confidential business records and database dumps are parsed completely client-side. Zero bytes are uploaded to remote servers.

Frequently asked questions

Does this tool support nested JSON objects with arrays?

Yes. It can flatten nested object properties using dot-notation column names (e.g., "user.profile.age") and serializes array values cleanly.

Can I import CSV files from Microsoft Excel?

Yes. You can paste standard comma-delimited or semicolon-delimited CSV text from Excel or Google Sheets to generate structured JSON arrays.

Are large datasets supported in browser?

Yes. It processes tens of thousands of rows client-side in seconds using optimized string streaming.

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JSON to CSV / CSV to JSON Converter