Convert spreadsheets to JSON for developers, or JSON back to CSV for Excel and Google Sheets.
🔒 Your data is converted in your browser – nothing is uploaded.
How to use the csv ⇄ json converter
- Paste CSV (first row = headers) or a JSON array.
- Click CSV → JSON or JSON → CSV.
- Copy or download the result.
Opening the CSV in Excel
Download the CSV and open it in Excel or Google Sheets. Nested JSON objects are written as JSON text inside the cell.
Frequently asked questions
Does it support semicolon-separated CSV?
Yes – comma, semicolon and tab separators are detected automatically.
Are numbers converted?
Yes, numeric values become numbers in JSON (values with leading zeros stay text).
Is my data uploaded?
No.