Convert JSON to CSV
Turn API responses and JSON exports into a CSV you can open in Excel. Nested fields become “parent.child” columns automatically.
- Processed on your device
- No sign-up
- No watermark
- Works offline
Coming soon · FileMoat Pro
Open, search and sort millions of rows
A spreadsheet viewer with no row limit — still running entirely in your browser.
How to
JSON to CSV in three steps
- 1
Drop a .json, .jsonl or .ndjson file.
- 2
Choose comma or semicolon.
- 3
Download the CSV.
FAQ
Good to know
Are my files uploaded to FileMoat?
No. The tool runs entirely inside your browser tab. Your files are read from your device, processed in memory and saved back to your device. Nothing is sent to our server — you can even disconnect from the internet after the page loads and it keeps working.
What JSON shapes are supported?
An array of objects, an object that wraps such an array (like {"data": [...]}) — we use that list and tell you which one — a single object, or JSON Lines with one record per line.
What happens to nested data?
Nested objects are flattened into dot-named columns, e.g. address.city. Lists are kept as JSON text in a single cell so nothing is lost.