Free JSON to CSV ConverterConvert JSON ↔ CSV instantly with quoted-field support, copy output, and private client-side processing.

What is a JSON to CSV converter?

A JSON to CSV converter flattens an array of objects into spreadsheet-friendly rows and columns. The reverse direction rebuilds a JSON array from a CSV header plus data rows.

Flat object keys map cleanly to columns. Nested structures usually need preprocessing before CSV export.

Why convert between JSON and CSV?

APIs often return JSON while analysts and spreadsheets expect CSV. Converting locally lets you move data between tools without uploading sensitive rows to a third-party service.

Quoted CSV fields with commas and escaped quotes are parsed carefully so round-trips stay faithful.

How to use this converter

1. Choose JSON → CSV or CSV → JSON (or swap direction).
2. Paste your input into the left panel (or load the sample).
3. Click Convert, then copy the output or fix any validation errors.

Privacy-first by default

All parsing and serialization happen in your browser. No JSON or CSV is uploaded, stored remotely, or used for training.

Frequently Asked Questions

What JSON format works best for CSV conversion?

Use a JSON array of objects with consistent keys, for example [{"name":"Ada","role":"Engineer"}]. Nested objects and arrays of primitives are not ideal for flat CSV.

Can I convert CSV back to JSON?

Yes. Switch the direction to CSV → JSON (or use Swap direction). The first row is treated as headers, and quoted fields with commas are parsed correctly.

Is my data uploaded anywhere?

No. Conversion runs fully in your browser. Your JSON and CSV stay on your device and are never uploaded to a server.