CSV to JSON Converter

Comma is the default, and the delimiter selector also supports semicolon, tab, and pipe. This covers exports from European spreadsheets that use semicolons, TSV files, and pipe-delimited enterprise reports, and switching the delimiter instantly re-parses your data.

With the option on, values like 25 and 3.14 become JSON numbers instead of strings, and the literals true and false become booleans. Turn it off when you need everything preserved as a string, which is safer for data like ZIP codes and phone numbers with leading zeros.

The parser understands RFC-style quoting: a field wrapped in double quotes may contain commas, semicolons, or even line breaks without splitting the row, and two consecutive double quotes inside a quoted field are treated as one literal quote character. Note that the trim-whitespace option applies to every cell, quoted or not, so uncheck it if leading spaces inside quoted fields matter.

Yes. Uncheck "First row contains headers" and every row, including the first, becomes an array of values keyed by column index instead of an object keyed by header names. The row and column counters plus the data preview table update live so you can confirm the shape before exporting.

No. Uploaded files are read with the browser FileReader API straight into the textarea, and parsing, the preview table, and the JSON output are all computed locally. Sensitive spreadsheets never leave your machine.