CSV to JSON converter
Convert CSV from Excel, Google Sheets or any export into JSON, or turn JSON back into CSV. Quoted fields, commas and line breaks inside cells are handled the RFC 4180 way. Choose the delimiter, use the first row as headers, detect numbers, and download the result.
How to use the CSV to JSON Converter
- 1Choose CSV to JSON or JSON to CSV.
- 2Paste your data or open a .csv or .json file. It stays on your device.
- 3Set the delimiter (or let it be detected), whether the first row has headers, and number detection.
- 4Check the preview table, then copy the result or download it as a file.
Frequently asked questions
How are commas and quotes inside CSV cells handled?
As RFC 4180 describes: a cell with a comma, quote or line break is wrapped in double quotes, and a quote inside it is written twice (""). The parser reads them back the same way.
Why are some numbers kept as text?
Values with leading zeros (like 007 or phone numbers) and whole numbers too large for JavaScript to store exactly stay as text, so nothing is silently changed.
My CSV uses semicolons. Will it work?
Yes. Spreadsheets in many European languages use semicolons. The delimiter is detected automatically, and you can choose comma, semicolon, tab or pipe yourself.
What does Protect against spreadsheet formulas do?
Cells starting with =, +, - or @ can run as formulas when a CSV is opened in Excel or Sheets. This option adds an apostrophe in front so they open as plain text.
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