Free Online JSON to Excel Converter (.xlsx)
Transform JSON arrays and nested data into multi-column Excel workbooks directly in your browser without uploading confidential data.
Key Features & Client-Side Capabilities
- Formatted Microsoft Excel Output: Generates genuine binary .xlsx workbooks with proper column headers and data type recognition.
- Zero Cloud Uploads: Your sensitive JSON feeds and API records never leave your local machine.
- Fast Client-Side Generation: Utilizes SheetJS and DuckDB-Wasm for high-performance in-memory spreadsheet construction.
Frequently Asked Questions
Can I open the generated Excel file in Microsoft Excel or Google Sheets?
Yes! The exported file is an industry-standard OpenXML spreadsheet (.xlsx) fully compatible with Microsoft Excel, Google Sheets, Apple Numbers, and LibreOffice Calc.
Is there a limit on how many JSON rows can be exported to Excel?
Microsoft Excel supports up to 1,048,576 rows per worksheet. TableView handles large JSON datasets up to Excel's native limits.
Are dates and numbers formatted properly in the resulting spreadsheet?
Yes, numeric values, timestamps, and ISO date strings are parsed and formatted as appropriate Excel column types.