Developer Tools
CSV / JSON Converter - Two-Way Data Conversion
Convert CSV to JSON and JSON to CSV in both directions. Move data between spreadsheets and API responses.
Moving between tables and code
Feeding spreadsheet data into an API or turning an API response into a table means converting between CSV and JSON sooner or later. The two formats are structured differently, so manual conversion invites mistakes.
This tool converts CSV to JSON and JSON to CSV in both directions. CSV uses the first row as the header to turn each row into an object, while JSON uses the keys of the first object as the header to lay the array out as a table. Everything runs locally in your browser.
Who gets the most out of it
- Backend and frontend developers — passing spreadsheet data into an API
- Data analysts — tabulating API responses
- DevOps engineers — converting configuration data
Frequently asked questions
Values wrapped in double quotes are treated as a single cell even when they contain commas. It follows the CSV standard (RFC 4180).
No. Conversion happens entirely in your browser. The input is never transmitted to or stored on a server.
Object or array values are serialized into a JSON string and placed in a single cell. Non-flat structures may result in some cells containing JSON strings.
Share this page