Can I create a file with multiple sheets?

Currently one sheet per conversion. For multiple sheets, download individual files and merge them in Excel.

Is my data uploaded to a server?

No. SheetJS generates the Excel file entirely in your browser. Your data never leaves your device.

Are nested objects supported?

Nested objects are serialized to a JSON string in the cell. Flatten your data first for clean column output.

Can I convert Excel back to JSON?

Yes — use the Excel to JSON Converter tool.

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JSON to Excel Converter

Convert a JSON array to a downloadable Excel (.xlsx) spreadsheet in your browser. Supports nested arrays. No uploads, free.

📊 Data & CSV Tools Free Browser-based

Tool

Sheet name

Output filename

JSON array

Output Format

The downloaded .xlsx file contains a single sheet with the JSON keys as column headers in the first row, followed by one row per JSON object. Numbers remain numeric, strings remain as text, null values become empty cells.

Library Used

This tool uses SheetJS (xlsx.js) to generate the Excel file entirely in your browser without any server uploads.

JSON to Excel Converter

Output Format

Library Used

Frequently Asked Questions