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JSON to CSV converter
Convert JSON to CSV format. Automatic parsing and formatting. Free, no registration.
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Why convert JSON to CSV?
JSON is the standard data exchange format for REST APIs, web applications, and NoSQL databases. However, for data analysis, reporting, and SQL database imports, you need a tabular format. CSV opens directly in Excel, Google Sheets, LibreOffice Calc, and every other spreadsheet application — no additional software needed.
Converting JSON to CSV transforms an array of JSON objects into a flat table where object keys become column headers and values become rows. This is essential when you download data from APIs (Stripe, Shopify, Google Analytics) and need to analyze it in a spreadsheet or import it into a relational database (MySQL, PostgreSQL).
The converter handles nested JSON objects by flattening them with dot notation (e.g., address.city). Arrays within values are serialized as text.
All processing happens locally in your browser — nothing is sent to any server. No registration, no limits, no tracking.
How to convert JSON to CSV
Convert
Click Convert to transform your JSON data into CSV format.Copy or download
Copy the CSV output to clipboard or download as a file.
What makes this converter different?
Complete privacy
Your files are processed entirely in your browser. Nothing is uploaded to any server.No limits
Convert as many files as you need. No daily limits, no file size restrictions, no watermarks.Quality control
Adjust settings to find the perfect balance between file size and quality.Instant conversion
All processing happens locally using modern browser APIs - fast and works offline after loading.
JSON vs CSV – format comparison
| Feature | JSON | CSV |
|---|---|---|
| Nested/hierarchical data | ||
| Tabular data | ||
| Schema validation | ||
| Human readable | ||
| API standard | ||
| Compact syntax |
JSON
- Nested/hierarchical data
- Tabular data
- Schema validation
- Human readable
- API standard
- Compact syntax
CSV
- Nested/hierarchical data
- Tabular data
- Schema validation
- Human readable
- API standard
- Compact syntax
How does JSON to CSV conversion work?
JSON (JavaScript Object Notation) stores data as structured objects with key-value pairs. CSV (Comma-Separated Values) organizes data in a flat table format with rows and columns. The converter flattens JSON objects into tabular rows, using property names as column headers.
For an array of JSON objects, each object becomes one row in the CSV output. The converter extracts all unique keys from the JSON data and uses them as column headers in the first row. Values are then placed in the corresponding columns for each record.
The resulting CSV uses standard formatting with comma delimiters and proper quoting for values that contain commas, quotes, or newlines. The conversion runs entirely in your browser — no data is sent to any server.
Tips for converting JSON to CSV
A few tips to help you avoid common issues during conversion:
Nested objects
CSV is a flat format and cannot represent nested structures. Nested JSON objects are flattened using dot notation (e.g., address.city) or serialized as strings.Arrays in values
If a JSON property contains an array, it will be serialized as a string in the CSV cell. For complex nested data, consider XML or YAML instead of CSV.Consistent structure
For best results, use JSON arrays where all objects have the same keys. Objects with different keys will still work, but missing values will appear as empty cells.Large datasets
The converter handles large JSON files efficiently in the browser. For files over 10 MB, processing may take a few seconds depending on your device.
Handling nested JSON structures
CSV is a flat tabular format — it cannot natively represent nested objects or arrays. The converter handles nesting in several ways:
- Nested objects – flattened using dot notation.
{"address": {"city": "Warsaw"}}becomes a column calledaddress.city. - Arrays of primitives – serialized as comma-separated strings within a single cell.
- Arrays of objects – serialized as JSON strings within the cell, preserving the structure for manual parsing.
- Null values – converted to empty cells in CSV.
For best results, use JSON with a flat structure (array of objects with primitive values). Deeply nested JSON may produce many columns with dot-notation headers.
Convert JSON to other formats
Frequently asked questions about JSON to CSV conversion
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