Convert CSV to JSON Online
APIs expect JSON; spreadsheets export CSV. Paste or upload CSV and get formatted JSON instantly — ideal for prototypes and data migration scripts.
How to convert
- Paste CSV or upload a file
- Enable 'First row is header' if column names are in row 1
- Review auto-detected delimiter (comma, tab, semicolon)
- Copy JSON or download
Limitations
Flat CSV becomes an array of objects. Nested JSON structures require manual mapping or a script — our tool focuses on the common 1:1 case.
Frequently Asked Questions
Is my spreadsheet data uploaded?
No. Conversion runs locally with JavaScript.