Turn a JSON array into a spreadsheet-ready CSV, with columns detected automatically and nested objects flattened. Everything happens in your browser.
Use semicolon if your spreadsheet is set to a European locale.
Nested objects become dotted columns (user.name); scalar arrays are joined with |.
They become dotted column names — {"user":{"name":"Ada"}} produces a user.name column. Arrays of plain values are joined with a pipe character so they stay in one cell.
Every key found anywhere in the array becomes a column, in first-seen order. Rows missing that key get an empty cell, so nothing is silently dropped.
Yes. Values containing commas, quotes or line breaks are quoted per RFC 4180, and the download includes a UTF-8 byte order mark so accented and non-Latin characters survive in Excel.
Excel in most European locales expects semicolons as the field separator. Tab-separated output is handy for pasting straight into Google Sheets or Numbers.