JSON to CSV Converter
Convert JSON arrays and objects to CSV format with nested flattening and file upload—perfect for data analysis and exports.
Our JSON to CSV Converter transforms structured JSON data into tabular CSV format with automatic nested object flattening (dot notation), single object detection, and RFC 4180-compliant escaping. Features 3 quick examples, file upload (up to 10MB), row/column counters, and copy/download—ideal for data analysts, developers, and engineers exporting API responses or database records for spreadsheet analysis.
Frequently Asked Questions
What is JSON to CSV conversion?
JSON (JavaScript Object Notation) is a structured data format with key-value pairs, while CSV (Comma-Separated Values) is a tabular format with rows and columns. Conversion transforms JSON arrays or objects into CSV rows, where each JSON key becomes a column header and values populate cells—ideal for spreadsheets, databases, or data analysis tools.
Can I convert a single JSON object (not an array)?
Yes! Our tool automatically detects single objects and treats them as a one-row array. For example, {"name": "John", "age": 30} converts to a CSV with headers 'name,age' and one data row '"John",30'. This works for both simple and nested objects.
How does nested JSON flattening work?
Nested objects are flattened using dot notation. For example, {"user": {"name": "Alice", "email": "alice@example.com"}} becomes columns 'user.name' and 'user.email'. Arrays within objects are converted to comma-separated strings. Deep nesting is supported up to reasonable levels.
What file size limits apply?
Maximum 10MB per JSON file for optimal performance. This handles ~100,000+ rows depending on structure. For larger datasets, consider splitting files or using server-side tools. Browser-based processing ensures privacy but has memory constraints.
Does it handle special characters in values?
Yes! Values with commas, quotes, or newlines are properly escaped per RFC 4180 CSV standards. Quotes are doubled ("") and values are wrapped in quotes when needed. Unicode characters are preserved, ensuring data integrity for international text.
Can I use the CSV in Excel or Google Sheets?
Absolutely! The generated CSV is compatible with Excel, Google Sheets, LibreOffice Calc, and other spreadsheet software. Simply download and open. For best results with special characters, use UTF-8 encoding (default in modern apps).