CSV to JSON / JSON to CSV Converter
Convert between CSV and JSON formats instantly in your browser. No data is sent to any server.
Common use cases
This converter is most useful when moving data between spreadsheet tools, APIs, and JavaScript applications.
Import spreadsheet data
Convert exported CSV files into JSON for use in APIs, config files, or JavaScript applications.
Prepare API payloads
Transform tabular data into JSON arrays before sending them to REST endpoints that expect JSON.
Export JSON for Excel
Convert JSON API responses into CSV format for opening in Excel, Google Sheets, or other spreadsheet tools.
Frequently asked questions
Short answers to the questions people usually have before using the tool.
Does this tool handle quoted fields with commas?+
Yes. Fields wrapped in double quotes are treated as a single value, so commas inside quotes are preserved correctly.
What JSON structure does the CSV converter produce?+
It creates an array of objects where each object uses the first row values as keys and subsequent rows as values.
Can I convert nested JSON to CSV?+
The tool works best with flat arrays of objects. Nested objects are serialized as JSON strings in the CSV output.
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