JSON ⇄ CSV Converter – Data Transform
Convert JSON to CSV and CSV to JSON instantly. Handle nested objects, arrays, and complex data structures.
Our JSON ⇄ CSV Converter converts between JSON and CSV formats. JSON (JavaScript Object Notation) is used for APIs and config files. CSV (Comma-Separated Values) is used in spreadsheets and data imports. Convert JSON arrays of objects to CSV for Excel, or CSV with headers to JSON for APIs.
Conversion runs entirely in your browser. Your data never leaves your device. JSON arrays of objects work best for CSV output; CSV must have headers for proper JSON conversion.
Features
- JSON to CSV conversion
- CSV to JSON conversion
- 100% client-side
- Handles arrays of objects
- No registration
How to Use
Paste your JSON (array of objects) or CSV (with headers) in the input area.
Click 'Convert JSON' to convert JSON to CSV, or 'Convert CSV' for CSV to JSON.
The result appears in the output area. Use Copy Result to copy.
Use Clear All to start over. For nested JSON, flatten first for clean CSV.
Frequently Asked Questions
What JSON format works best for CSV?
JSON arrays of flat objects work best. Example: [{"name":"A","age":1},{"name":"B","age":2}]. Complex nested structures may not convert cleanly.
Does CSV need headers?
Yes. For CSV to JSON conversion, the first row must be headers. They become the JSON object keys.
Is my data sent to a server?
No. All conversion happens in your browser using PapaParse. Your data never leaves your device.