CSV ↔ JSON Converter
Convert spreadsheet rows into JSON or turn JSON data into CSV. Preview, copy, and save your result privately in your browser.
Runs in your browser · Files never uploaded
Data converter
Convert between CSV and JSON
Bring spreadsheet rows into JSON, or make JSON data ready for a spreadsheet.
Your converted data will appear here
Choose a file or paste data, then press Convert to preview it before saving.
CSV fields stay as text; no automatic number or date changes.
How to use CSV ↔ JSON Converter
- 1
Choose a direction
Pick CSV → JSON or JSON → CSV, then paste your data or choose a local file.
- 2
Set CSV options
For CSV input, choose a separator or let the tool detect it. Tell the converter whether the first row has column names.
- 3
Preview the conversion
Select Convert to check the result. Malformed quotes and unsupported JSON row shapes show a clear error.
- 4
Copy or save
Copy the output or download a .json or .csv file. Your original file is left unchanged.
Reliable CSV and JSON conversion in your browser
CSV parsing supports comma, semicolon, tab, and pipe separators, quoted cells, escaped quotes, and line breaks inside quoted cells. Separator detection ignores delimiters inside quoted values.
CSV values remain text so identifiers such as postal codes and values with leading zeroes are preserved. JSON-to-CSV accepts arrays of objects or arrays; nested values are encoded as JSON text inside a CSV cell.
Files are read and converted on your device. The tool accepts inputs up to 5 MB to keep conversion responsive.