Key takeaways
- CSV to JSON turns each row of a spreadsheet into a JSON object, using the header row as the field names.
- Useful for feeding spreadsheet data into an API, a script, or a JSON-based config file.
- Works from a pasted CSV or an uploaded file — the structure is generated instantly.
- The reverse direction (JSON back to CSV) is a separate tool if you need to go the other way.
Converting a CSV
Open CSV to JSON, paste your CSV data or upload a file — the first row is treated as column headers, and each following row becomes one JSON object with those headers as keys.
One thing to check afterward
If a column contains numbers you want treated as numbers (not text) in the resulting JSON, check the output — spreadsheet exports sometimes store numeric-looking values as text, which carries through unless you clean the source data first.
Frequently asked questions
Does it handle commas inside a quoted field?
Yes — standard CSV quoting (a comma inside double quotes) is handled correctly, not treated as a column break.
Can I go from JSON back to CSV?
Yes, use [JSON to CSV](/json-to-csv) for the reverse direction.