Online JSON to CSV converter: transform JSON arrays or objects into CSV format. Custom delimiter, headers, flatten nested objects. One-click CSV download.
TL;DR: Free online JSON and CSV converter with automatic nested object flattening and type inference. Easy Excel import, runs locally in your browser.
This tool runs entirely in your browser. Open DevTools → Network panel and search your input — it appears in no request.
FAQ
Completely free, no registration required. Convert between JSON and CSV directly in your browser — all operations run locally with no usage limits.
Nested objects are automatically flattened, with keys joined by dots (e.g., user.address.city) as column names. Array values are converted to JSON strings or expanded by delimiter for easy import into Excel and similar tools.
No. All JSON and CSV conversion runs locally in your browser. Your data is never sent to any server.
Yes. The tool supports type inference, automatically converting numbers, booleans, null, and other values from strings to their proper types to avoid everything becoming strings.
Related Tools
Related Articles
Online CSV/JSON Converter: Convert Between Table Data Formats
Learn how to convert between CSV and JSON formats using an online tool. Understand the differences between CSV and JSON, and their use cases in data import/export and API development.
Online JSON/CSV Converter: Convert Between JSON and Table Formats
Learn how to convert between JSON and CSV formats. Understand JSON array to table conversion, CSV to JSON methods, and applications in data analysis and data export.
Online XML/JSON Converter: Convert Between Data Formats
Learn how to convert between XML and JSON formats. Understand the differences between XML and JSON, and use cases in API integration, configuration management, and data exchange.