CSV to JSON Converter

Convert CSV to JSON or JSON to CSV, check the preview and download your data — all in your browser.

Convert tabular data

Conversion direction CSV delimiter

Use column headers

Or choose a CSV or JSON file

Input Converted result

Your data stays on this device; nothing is uploaded.

CSV headers become JSON property names when enabled. Nested JSON values are kept in CSV cells as JSON text. Files are processed locally.

Data preview

Convert data to see a preview.

About CSV and JSON

CSV stores table-like information as rows and columns in a compact text file, making it a common choice for spreadsheets, exports and data exchange. JSON represents structured data with named fields and nested values, which makes it widely used by websites, applications and APIs.

Moving between these formats helps people take spreadsheet data into software or turn an API response into a table they can inspect. Column names, delimiters, quoting and empty cells all affect how the same data is interpreted, so checking a preview helps catch mistakes before using the converted file.

A CSV to JSON converter is useful for developers, analysts and anyone moving data between tools that expect different formats. For private or sensitive information, local processing avoids sending the source file to a conversion service; still, review the output because complex nested values may need a format-specific adjustment.