How to use JSON to CSV
- Paste JSON or open a file.
- Choose the delimiter (semicolon suits Excel in many European locales).
- Press Convert to CSV and download.
Questions
How are nested objects handled?
They're flattened into columns with dotted names, such as user.name. Arrays are written as JSON text inside one cell.
Will Excel show accents correctly?
Yes. The downloaded CSV includes a UTF-8 marker so Excel reads accented letters properly.
Is my data uploaded to a server?
No. The tool runs in your browser and works on your data directly on your device. Nothing is sent to us or anyone else, which is why it also keeps working if your connection drops after the page loads.
Last updated 13 November 2026.