How to use it
- Paste CSV data or a JSON array of objects.
- Click CSV to JSON or JSON to CSV.
- Copy the converted output.
Why use it
- Turn spreadsheet exports into JSON for APIs and code.
- Convert API responses into CSV for reporting.
- Handles quoted fields and commas correctly.
- Runs locally for privacy.
- Free and fast with no limits.
CSV vs. JSON
CSV (comma-separated values) is a simple tabular format used by spreadsheets, database exports, and reporting tools. JSON is a structured, nested format used by almost every modern API and programming language. Converting between them is a daily task for anyone moving data between a spreadsheet and an application.
- CSV to JSON converts each row into an object, using the header row as keys. This is the format most code and APIs expect.
- JSON to CSV flattens an array of objects into rows with a header line, which is what people import into Excel, Google Sheets, and BI tools.
The converter handles quoted values, escaped quotes, and commas inside fields, so your data is parsed accurately rather than being split at the wrong position.