Convert JSON to Excel - Free JSON to XLSX Converter Online
Convert JSON arrays and objects to Excel .xlsx files online. Download spreadsheet-ready XLSX from JSON data instantly, no upload, no server.
Array of objects / Array of arrays / Single object
Paste JSON and click Convert. Each array element becomes a row. Nested objects are serialized as JSON strings in cells.
JSON Input
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Excel Output
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How to Convert JSON to Excel Online
Paste your JSON array, object, or API response into the input, or upload a .json file.
Optionally set a custom sheet name for the Excel workbook.
Click Convert to generate the Excel .xlsx file instantly in your browser.
Click Download to save the .xlsx file to your device.
Why Use This JSON to Excel Converter
True .xlsx Output
Generates a real Excel .xlsx file using SheetJS, not a renamed CSV. Opens natively in Excel, Google Sheets, and Numbers.
Private Browser-Based Processing
Your JSON never leaves your device. All conversion happens client-side with no server upload.
Flexible JSON Support
Supports arrays of objects, arrays of arrays, single objects, and primitive values. Nested structures are serialized as JSON strings.
FAQ
What JSON structures are supported?
Arrays of objects, arrays of arrays, single objects, and primitive values. Nested structures become JSON strings in cells.
Is the output a real .xlsx file?
Yes. The converter uses SheetJS to produce a proper Excel .xlsx workbook, not a CSV with an .xlsx extension.
Is my data uploaded to a server?
No. Everything runs locally in your browser so your data stays on your device.
Paste a JSON array or object and this tool instantly converts it into a downloadable Excel .xlsx workbook—mapping each array element to a row and each key to a column header. It produces a genuine SheetJS-generated XLSX file (not a renamed CSV), serializes nested objects as JSON strings in cells, and runs entirely in your browser with no server upload.
How to Convert JSON to Excel
- 1
Paste your JSON
Enter a JSON array of objects, array of arrays, or a single object into the input field, or upload a .json file.
- 2
Set a sheet name
Optionally name the worksheet for the generated Excel workbook; it defaults to Sheet1.
- 3
Click Convert
The tool flattens your JSON into rows and columns and builds a real .xlsx workbook using the SheetJS engine.
- 4
Download the .xlsx file
Save the spreadsheet to your device and open it in Excel, Google Sheets, or Numbers.
References
- RFC 8259 — The JSON Data Interchange Format
The IETF specification defining the JSON syntax accepted as input by this converter.
- ECMA-376 — Office Open XML File Formats
The standard defining the .xlsx (SpreadsheetML) format produced by the converter.
- SheetJS — Documentation
Official documentation for the SheetJS library used to generate the Excel workbook in your browser.
Related Tools
Excel to JSON
Reverse the conversion: turn .xlsx spreadsheets back into JSON arrays.
JSON to CSV
Export JSON to comma-separated values for lightweight tabular data.
CSV to JSON
Convert tabular CSV data into structured JSON arrays.
JSON Formatter
Beautify and validate your JSON before converting it to Excel.
Frequently Asked Questions
- What JSON structures are supported?
- Arrays of objects, arrays of arrays, single objects, and primitive values. Nested structures become JSON strings in cells.
- Is the output a real .xlsx file?
- Yes. The converter uses SheetJS to produce a proper Excel .xlsx workbook, not a CSV with an .xlsx extension.
- Is my data uploaded to a server?
- No. Everything runs locally in your browser so your data stays on your device.
- How are nested objects and arrays handled?
- Nested objects and arrays are serialized as JSON strings inside their cells, preserving the data while keeping each element on a single row.
- Can I open the file in Google Sheets or Numbers?
- Yes. The generated .xlsx is a standard Office Open XML workbook, so it opens natively in Microsoft Excel, Google Sheets, and Apple Numbers.