JSON to CSV Converter
JSON (JavaScript Object Notation) and CSV (Comma-Separated Values) are two of the most common data interchange formats. This tool converts a JSON array of flat objects into a well-formed CSV file, automatically extracting column headers from the object keys, and escaping any fields that contain commas, double-quotes, or newlines according to RFC 4180.
You can also convert in the reverse direction — paste a CSV file and get back a JSON array of objects, ready to use in any programming language or API. The parser correctly handles quoted fields, embedded commas, and escaped double-quotes, making it suitable for real-world data exports from spreadsheets, databases, and SaaS platforms.
How it works
JSON → CSV: extract unique keys as header row, then for each object emit a row of values in the same order; wrap any value containing a comma, double-quote, or newline in double-quotes and escape internal double-quotes by doubling them (RFC 4180). CSV → JSON: parse the header row as keys, split each subsequent row into fields using the same quoting rules, and pair each field with its corresponding header to form an object.
Use cases
- Exporting API response data into a spreadsheet-friendly CSV for analysis in Excel or Google Sheets
- Importing CSV database dumps back into a JavaScript or Python application as structured JSON
- Preparing data migrations between systems that use different formats
- Quickly inspecting the structure of a JSON API payload in tabular form
- Converting configuration or seed data between JSON and CSV for use in ETL pipelines