JSON to XLSX Converter
Paste a JSON array and download a properly formatted Excel spreadsheet — free, instant, browser-based.
JSON Input — array of objects
How to convert JSON to XLSX
- Paste a JSON array of objects into the input area.
- Each object key becomes a column header; each object becomes a row.
- Click Download as XLSX — the file downloads instantly.
- Open in Microsoft Excel, Google Sheets, or LibreOffice Calc.
Privacy — your data stays local
This tool uses SheetJS, an open-source library that runs entirely in your browser. Your spreadsheet and JSON data are never sent to a server. All processing happens locally on your device.
Frequently Asked Questions
What JSON structure is expected?
An array of objects where each object has the same keys. The keys become column headers in the XLSX.
Which XLSX sheets are read?
Only the first sheet (worksheet) is read when converting XLSX to JSON.
Are formulas preserved?
When reading XLSX, formulas are converted to their computed values. JSON does not support spreadsheet formulas.
Is there a file size limit?
No hard limit — it depends on your browser's available memory. Files up to a few hundred MB typically work fine.
Is this tool free?
Yes — completely free, no account required.