Spreadsheets to structured data and back
Paste CSV from Excel or a database export and get clean JSON — as objects keyed by the header row, or raw arrays. Flip the direction to turn a JSON API response into a CSV you can open in a spreadsheet. Comma, semicolon, and tab delimiters are all supported.
Frequently asked questions
Is my data uploaded?
No — and spreadsheets are exactly the kind of data that shouldn't touch a random server. Parsing and conversion run entirely in your browser.
How are quoted fields and commas inside values handled?
The parser follows the CSV standard (RFC 4180): quoted fields, escaped double quotes, and even line breaks inside quotes all convert correctly.
What JSON shapes convert to CSV?
An array of objects becomes rows with a header built from all keys; an array of arrays converts directly. Nested objects are stringified.