Convert between JSON arrays and CSV files. Automatically flattens nested objects and handles complex data structures.
CSV output will appear here...
Convert JSON arrays to CSV files or transform CSV data into JSON objects. Our tool handles nested objects by flattening them with dot notation, making it easy to work with complex data structures in spreadsheet applications.
Paste your JSON array or object into the input field. The tool automatically detects the structure and locates the relevant array data, even if it's nested inside a wrapper object.
Nested objects are recursively flattened using dot-notation (e.g., 'user.address.zip'). This transforms hierarchical data into a tabular format compatible with spreadsheets.
The normalized data is processed and converted into a standard CSV format, ensuring proper handling of delimiters, line breaks, and special characters.
Shift data from NoSQL databases or modern APIs (JSON) into legacy systems or SQL databases that require CSV imports.
Export structured API data into Excel or Google Sheets for advanced filtering, pivot tables, and statistical analysis.
Convert structured application logs into a flat format to identify trends or debug issues more efficiently.
All processing happens directly in your browser. Your data never leaves your device — we don't upload, store, or have access to any of your content.
No server roundtrips means instant results. Once this page is loaded, the tool works even without an internet connection.
Yes. Unlike other online converters, DataFormatHub processes all data entirely within your browser. No data is sent to our servers, ensuring 100% privacy for sensitive business or personal files.
Our converter uses a recursive flattening algorithm. Nested keys are joined by dots (e.g., 'profile.settings.theme'), allowing you to view complex hierarchies as clear columns in a CSV.
Since the processing is done in your browser, the limit depends on your device's memory. Most modern browsers can easily handle JSON files up to 50MB-100MB instantly.