JSON to CSV Converter Online — Convert JSON to CSV and Back, Free
Convert JSON arrays to CSV and CSV to JSON. Paste or upload.
Privacy first: This tool runs entirely in your browser. Your data never leaves your device.
Convert JSON arrays to CSV files and CSV files back to JSON instantly in your browser. Paste your data or upload a file, and the converted output is ready to copy or download. No data is ever sent to a server — all conversion is done locally.
How to Use JSON to CSV Converter
- Choose conversion direction: Select whether you want to convert JSON to CSV or CSV to JSON.
- Paste or upload your data: Paste your JSON or CSV text into the input area, or upload a file.
- Convert: Click "Convert" to generate the output.
- Copy or download: Copy the result to your clipboard or download it as a file.
Features
- Converts JSON arrays to CSV with auto-detected headers
- Converts CSV back to a JSON array
- Handles nested fields and quoted strings
- Runs entirely in your browser — no server upload
- Free with no account required
- Supports file upload and direct paste input
Common Use Cases
Data engineers and analysts regularly convert between JSON and CSV when moving data between APIs (which return JSON) and spreadsheet tools or databases (which prefer CSV). It is also used for preparing data exports and imports.
Frequently Asked Questions
- What JSON structures can be converted to CSV?
- The tool converts flat JSON arrays of objects (where each object represents a row). Deeply nested structures may require flattening before conversion.
- Are my files uploaded to a server?
- No. All conversion happens locally in your browser. Your data never leaves your device.
- Does the converter handle quoted commas in CSV?
- Yes. The CSV parser correctly handles fields that contain commas, newlines, or quotes by following the RFC 4180 CSV specification.
- Can I convert large files?
- The tool handles typical data file sizes. Very large files (tens of megabytes) may be slower depending on your device.