CSV ↔ JSON Converter.

Move tabular data between spreadsheets and APIs without uploading a file.

Runs entirely in your browser

Delimiter

First row contains headers Infer numbers and booleansOpen local file

CSV input

JSON output

Ready for CSV.

FIELD NOTES / 012

Rows in. Objects out.

Quoted fields, embedded commas, line breaks, and common delimiters are parsed correctly. Convert in either direction and download the result when it is ready.

Good to know

Are spreadsheet files supported?

Export Excel or Google Sheets as CSV first. This keeps the page lightweight and avoids silently losing workbook formulas, styles, or multiple sheets.

How are duplicate headers handled?

They are reported by the parser. Use unique column names before relying on object output.