CSV to JSON

Convert CSV, TSV, or delimited rows into JSON with header and value-type controls.

Delimiter

First row contains headersConvert numbers and booleans

CSV input

CSV · 3 lines

Quoted delimiters, escaped quotes and multi-line values are supported. Up to 1 MB.

JSON output

JSON · 1 line

0 rows · 0 columns. Values stay strings unless conversion is enabled.

How this tool works

Convert rows

Paste up to 1 MB of CSV or tab-separated data. Quoted commas, escaped quotes and multiline cells are supported. Detect the delimiter automatically or choose comma, tab, semicolon or pipe.

Use the first row as field names, or turn headers off to create arrays. Duplicate headers and uneven row lengths are reported rather than silently dropping values. Values remain strings unless you enable number and boolean conversion; leading-zero IDs and unsafe integers remain strings. Copy or download the JSON result.

Privacy

Input and output stay in this browser tab.