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Developer Tools
Developer Tools
JSON Conversion
JSON to CSV · JSON to Excel (XLSX) — convert JSON arrays to CSV or XLSX files instantly, or convert CSV/XLSX back to JSON. Powered by SheetJS, processed entirely in your browser. No data is sent to any server. Free online JSON to CSV converter.
How to Use
① Select a conversion direction (JSON→CSV, JSON→XLSX, CSV→JSON, XLSX→JSON). ② For text modes, paste your JSON or CSV into the input field. ③ For XLSX→JSON, upload a file. ④ Click 'Convert' to see the result or download.
When to Use
• Converting API response JSON to Excel for sharing with teammates • Transforming database export JSON into CSV for analysis • Converting Excel data to JSON for development use • Turning CSV data into JSON API format
Frequently Asked Questions
- Q. What JSON format is supported?
- A. Arrays of objects ([{...}, {...}]) are supported. Wrap a single object in an array before converting.
- Q. Which sheet is converted in an XLSX file?
- A. The first sheet is automatically selected.
- Q. Is the file uploaded to a server?
- A. No, all processing happens in your browser. Files are never sent to any external server.
- Q. How are multiple sheets handled when converting Excel (XLSX) to JSON?
- A. Currently only the first sheet is converted. To convert multiple sheets, save each sheet as a separate file and convert them individually.
- Q. Will Korean, Chinese, or other non-ASCII characters break when converting JSON to CSV?
- A. No. Processing is done with UTF-8 encoding, so Korean, Japanese, Chinese, and other multilingual characters are handled correctly.