CSV to JSON

Convert CSV or spreadsheet data into JSON arrays or objects, with header detection and type conversion. Runs in your browser, free.

DelimiterFirst row is headersNumbers & true/false as valuesSkip empty rowsIndent

CSV

JSON

How to use CSV to JSON

Paste CSV or open a .csv file — the delimiter is detected automatically.
Choose whether the first row holds the column names and whether numbers become numbers.
Copy or download the JSON.

Runs entirely in your browser. Nothing you enter or open here is uploaded.

Does it handle commas inside values?

Yes. Quoted fields, doubled quotes and line breaks inside quotes are all read correctly.

What about Excel files?

Save the sheet as CSV first (File → Save As → CSV), then open it here.