CSV behavior

The parser supports quoted fields, doubled quotes and line breaks inside quoted fields. By default it requires a consistent field count and treats the first row as a header.

JSON behavior

JSON-to-CSV accepts an array of objects or an array of arrays. Object keys are unioned in first-seen order so later fields are not silently dropped.

Spreadsheet formula warning

Cells beginning with characters such as =, +, - or @ can be interpreted as formulas by spreadsheet programs. The optional neutralization setting changes those values deliberately; it is off by default to preserve data exactly.

Privacy

Parsing and conversion happen in the browser. No input is uploaded, logged or retained.