Frequently Asked Questions
What input format does this tool expect?
Paste or upload a JSON array of objects. Each object becomes a row; the keys of the first object become CSV column headers.
Does this handle nested objects?
Nested object values are serialised as JSON strings in the CSV cell. For flat structures, the output is clean CSV.
Is my data uploaded to a server?
No. Conversion runs entirely in your browser using JavaScript.
Example input/output
Input: [{"name":"Ada","age":30},{"name":"Bob","age":25}]
Output: name,age
Ada,30
Bob,25
How it works
This tool parses the JSON array, extracts keys from the first object as column headers, then writes one comma-separated row per array element. Values containing commas or newlines are quoted. Processing runs in your browser.
Common use cases
- Export API response data to a spreadsheet-friendly CSV format.
- Convert JSON database records to CSV for import into Excel or Google Sheets.
- Prepare structured JSON test data for CSV-based testing tools.