JSON TO CSV

Convert JSON arrays to CSV and Excel instantly in your browser. Live spreadsheet preview. Your data never leaves your device.

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How the Conversion Works

Input Format

Accepts a JSON array of objects. Each object in the array becomes one row. All unique keys across all objects are collected to form the column headers.

[ {"name":"Alice","age":30}, {"name":"Bob","city":"NYC"} ]

Output Format

Missing keys produce empty cells — no data loss. Nested objects and arrays are serialised to JSON strings in the cell. Headers are the superset of all keys.

name,age,city Alice,30, Bob,,NYC

CSV Standard

  • RFC 4180 compliant output
  • Values containing commas or quotes are properly escaped
  • Compatible with Excel, Google Sheets, Numbers, pandas, R
  • UTF-8 encoding

Excel Export

XLSX uses the OOXML standard via SheetJS. Opens natively in Excel, Google Sheets, LibreOffice, and Apple Numbers. Useful when you need spreadsheet formatting or formula support.

Frequently Asked Questions

What JSON format does this converter accept?
The converter accepts a JSON array of objects — for example: [{"name":"Alice","age":30},{"name":"Bob","age":25}]. Each object becomes a row, and each unique key becomes a column header. Single objects are automatically wrapped in an array.
Is my JSON data sent to a server?
No. All conversion happens entirely in your browser using JavaScript. Your JSON data is never transmitted to FindBeam's servers or any third party. The tool works completely offline after the page loads.
What happens if my JSON objects have different keys?
The converter collects all unique keys across every object in the array and uses them as column headers. If a row is missing a key, the corresponding cell is left empty. This preserves all data even with inconsistent schemas.
What is the difference between CSV and Excel (.xlsx) export?
CSV is a plain text format compatible with every spreadsheet application, database, and data pipeline — the safest default for data interchange. Excel .xlsx is the Microsoft Office Open XML format — useful when you need spreadsheet features or direct compatibility with Excel, Google Sheets, or Numbers.
How are nested JSON objects handled?
If a value is a nested object or array, it is serialised to a JSON string in the corresponding cell. For example, {"tags":["a","b"]} becomes the string ["a","b"] in the CSV output. All data is preserved without loss.
How are commas and special characters handled in CSV?
Values containing commas, double quotes, or newlines are automatically wrapped in double quotes per RFC 4180. Existing double quotes in values are escaped as two consecutive double quotes. This ensures correct parsing in all CSV-compliant applications.
Is there a row or file size limit?
There is no hard row limit. Performance depends on your browser and device. Files up to 5MB are processed efficiently in modern browsers. For very large datasets over 10MB, consider splitting the JSON array into smaller batches and converting separately.
Is this JSON to CSV converter free?
Yes. FindBeam's JSON to CSV converter is completely free with no account, no registration, and no usage limits. It will remain free.