What JSON shape works best?
An array of objects works best, such as [{"name":"Ada","score":3}]. A single object is treated as one row.
CSV / JSON Converter
Workflow
Convert between JSON object arrays and CSV text locally.
Output
Output will appear here.
The JSON, CSV, delimiter, and output stay in this browser and are not uploaded to Your Free Tools or third parties.
CSV / JSON Converter
Convert flat JSON object arrays to CSV, or convert header-based CSV to JSON. Comma, semicolon, and tab delimiters are supported.
Table conversionJSON to CSVCSV to JSONData conversionLocal CSV
Use cases
- - Turn API JSON arrays into CSV for spreadsheet tools.
- - Convert small CSV test data into JSON for scripts or APIs.
- - Handle temporary configuration or sample data without uploading it.
How to use
- 1Choose JSON to CSV or CSV to JSON.
- 2Select a delimiter and paste the source content.
- 3Run the tool, then copy the result, preview rows, or download the converted file.
Features
Conversion mode: JSON to CSV / CSV to JSON
Delimiter: Comma / Semicolon / Tab character
Turn API JSON arrays into CSV for spreadsheet tools.
Convert small CSV test data into JSON for scripts or APIs.
FAQ
How are CSV field names chosen?
The first row is used as headers. Duplicate names get suffixes and empty names become column_1 style labels.
Will data be uploaded?
No. Conversion, preview, and downloads run locally in this browser.