CSV to JSON Converter
Convert CSV to JSON and JSON back to CSV - two-way, with header detection.
100% local - nothing is uploaded
About this tool
Convert CSV to JSON or JSON to CSV directly in your browser. The converter detects the header row, handles quoted fields and commas inside values, and pretty-prints the JSON output. Useful for turning spreadsheets into API-ready data and back, without uploading sensitive files.
Are quoted fields supported?
Yes - values wrapped in double quotes can contain commas, escaped quotes and line breaks.
What JSON shape does it expect?
For JSON to CSV, provide an array of flat objects; the keys become the column headers.
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