JSON to CSV Converter – Convert JSON Data to CSV Free
Convert JSON arrays to CSV format online instantly. Auto-detects keys, supports nested objects, custom delimiters, and live table preview—download your CSV file free.
Runs in your browser
WebAssembly, no server
No signup required
Open and use instantly
Files stay private
Nothing leaves your device
How It Works
Paste your JSON data (array of objects) into the input field
Select delimiter preference (comma, tab, or custom)
Click 'Convert to CSV'
Key Features
- Convert JSON arrays to properly formatted CSV
- Column headers auto-detected from JSON keys
- Nested object flattening (dot-notation)
- Comma, tab, or custom delimiter options
- Download as .csv file
- Copy output to clipboard
- Validates JSON before conversion
- Shows error messages for invalid JSON
- No sign-up required
- 100% browser-based
- Free with no limits
About This Tool
Our JSON to CSV Converter transforms JSON data into a clean CSV spreadsheet format that can be opened in Excel, Google Sheets, or any spreadsheet tool — in seconds.
When to Convert JSON to CSV
- Data analysis: CSV is easier to open and analyze in Excel or Google Sheets
- Reporting: export API data to spreadsheets for non-technical stakeholders
- Database import: many databases and CRMs accept CSV for bulk data import
- ETL pipelines: CSV is a universal data exchange format
What Types of JSON Are Supported
- JSON arrays of objects (most common API response format)
- Flat JSON objects
- Nested objects (flattened to dot-notation columns)
Example
``
json
[{"name": "Alice", "age": 30}, {"name": "Bob", "age": 25}]
`
Becomes:
name,age
Alice,30
Bob,25
Output Options
- Comma-delimited (standard CSV)
- Tab-delimited (TSV)
- Custom delimiter
- Include or exclude header row
Frequently Asked Questions
Arrays of objects ([ {...}, {...} ]) are best supported. Flat single objects are also handled. Deeply nested arrays may require preprocessing.
Yes — all unique keys across all objects in the array become column headers.
Nested objects are flattened using dot notation (e.g., address.city becomes a column named 'address.city').
Yes — download the CSV file and open it directly in Microsoft Excel or Google Sheets.
The tool validates your JSON and shows a clear error message with the location of the syntax issue.
No — all conversion runs in your browser. Your data never leaves your device.
Yes — completely free with no sign-up.
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