Converting Between CSV and JSON

CSV and JSON are the two most common data interchange formats, but they're used in very different contexts. Spreadsheets and databases export CSV. APIs and web apps speak JSON. This tool bridges the gap so you don't have to write a throwaway script every time you need to convert between them.

CSV to JSON

Paste your CSV data and the tool converts each row into a JSON object, using the header row as keys. Handy when you need to seed a database from a spreadsheet export, or when you want to transform tabular data for a frontend component.

JSON to CSV

Going the other direction — flatten an array of JSON objects into comma-separated rows. Useful for getting API data into Excel or Google Sheets, or for generating reports from JSON exports.

Everything runs in your browser. Your data stays on your machine — nothing gets uploaded.