JSON to CSV Converter is a 100% free, browser-based utility that enables you to convert json arrays to csv, flattening nested objects. Unlike traditional cloud converters, all processing executes locally on your device with zero server uploads, delivering immediate results and ironclad data privacy.
About the JSON to CSV Converter
Paste a JSON array (for example an API response) and get a CSV table you can open in Excel, Numbers or Google Sheets. Every object becomes a row and every key becomes a column. Nested objects are flattened into columns such as "address.city", and arrays are stored as JSON text so no data is lost.
Values containing commas, quotes or line breaks are quoted correctly according to RFC 4180, so the file imports cleanly.
How to use the JSON to CSV Converter
- Paste a JSON array of objects (a single object also works).
- Choose the delimiter: comma, semicolon or tab.
- Preview the table, then copy the CSV or download it as a .csv file.
Features
- Flattens nested objects
- RFC 4180 quoting
- Comma, semicolon or tab
- Table preview
Why Choose In-Browser JSON to CSV Converter vs Cloud Converters?
| Feature | Toolora (In-Browser) | Traditional Cloud Tools |
|---|---|---|
| Data Privacy | 100% Private (Files stay on device) | Uploaded to remote servers |
| File Size Limits | Unlimited (Limited only by your RAM) | Restricted (e.g. 10MB–50MB caps) |
| Processing Speed | Instant (Zero upload/download delay) | Slow upload & queue waiting |
| Ads & Popups | Clean, distraction-free | Heavy banner & interstitial ads |
Frequently asked questions
How are nested objects handled?
Nested keys are joined with a dot. {"user": {"name": "Ann"}} becomes a column called "user.name". Arrays are written as JSON text in a single cell.
What if objects have different keys?
The converter collects every key from every object, in the order they first appear. Missing values are left empty.
Why use semicolons?
In many European locales Excel expects semicolons because the comma is the decimal separator. Choose semicolon if your columns do not split correctly.