JSON to CSV Converter
Transform JSON datasets and arrays of objects into formatted CSV spreadsheets in seconds. Features automatic nested key flattening, custom delimiters, full Unicode support, and instant CSV file downloads with complete client-side security.
Convert structured JSON arrays and API responses into clean CSV spreadsheet tables. In-browser client parsing with zero data uploads and instant export.
Key Features
Explore performance capabilities engineered for in-browser execution.
How to Use This Tool
Follow these 3 simple steps to use JSON to CSV directly in your browser.
Paste your JSON array of objects into the editor or upload a .json file from your computer.
Choose your preferred column delimiter (comma, semicolon, tab, pipe) and nested object flattening preference.
Click 'Convert JSON to CSV' to generate the spreadsheet output, then copy to clipboard or download the .csv file.
Flatten Nested JSON Objects into Excel-Compatible CSV Spreadsheets
Business stakeholders and financial analysts rely on spreadsheets rather than raw JSON payloads. ToolDolfen JSON to CSV scans your JSON object structures, flattens nested keys into dot-notated columns, and exports RFC 4180-compliant CSV files that open cleanly in Excel, Google Sheets, or Apple Numbers.
Transform raw API exports and event logs into structured CSV sheets that marketing and sales analysts can filter and chart.
Convert document-store database records (like MongoDB or Firestore exports) into flat spreadsheets for auditing.
If your JSON contains arrays of objects, make sure the objects share consistent keys so the CSV columns align perfectly.
Frequently Asked Questions
Clear, verified answers to common technical and workflow questions about JSON to CSV.
What JSON formats are supported?
You can convert standard arrays of objects (e.g. [ { 'name': 'Ali', 'age': 25 } ]), single objects, or payloads containing nested array collections (e.g. { 'data': [ ... ] }).
How are nested objects and arrays handled?
With nested flattening enabled, sub-properties are flattened into dot-notated column headers (e.g. address.city). Alternatively, you can serialize nested objects directly as JSON strings.
Are commas and quotation marks inside data handled safely?
Yes. Our serializer follows RFC 4180 guidelines, wrapping cells with embedded commas or line breaks in quotes and escaping internal double-quotes as double-double-quotes ('').
Is my JSON data kept private?
Yes. All conversion logic runs 100% locally in your browser. Your sensitive datasets, customer lists, and database dumps are never transmitted to any server.
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