Developer tool
JSON to CSV Converter
Convert JSON arrays to CSV files. Free, private, no data stored.
JSON CSV
PrivConvert
Privacy-first conversion
No files stored
In-memory processing
Deleted instantly
No sign-up needed
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JSON arrays to spreadsheet-ready CSV
Got an API response or database export in JSON? Convert it to CSV so you can open it in Excel, Google Sheets, or any data tool.
- Auto-detect keys - column headers are extracted from JSON keys
- Nested objects - nested values are serialized as JSON strings
- UTF-8 output - handles international characters correctly
Frequently Asked Questions
How are nested objects handled?
Nested objects are serialized as JSON strings in the CSV cell. Top-level keys become column headers.
What becomes the column headers?
All unique top-level keys from the JSON objects are used as CSV column headers.
What if array items have different keys?
The CSV includes a column for every unique key found across all objects. Missing values are left empty.
Is this tool really free?
Yes, completely free with no hidden fees, no watermarks, and no sign-up required. You can convert as many files as you need.
Are my files private and secure?
Absolutely. Every conversion runs in an isolated, in-memory process. Your files never touch the disk, are never stored or shared, and are deleted from memory the moment your download is ready.