Why is there no text output?

XLSX is a binary format. Use the preview table and Download .xlsx instead.

Can I rename the worksheet?

Yes — set the sheet name option (max 31 characters, Excel limit).

No. ExcelJS is loaded and runs entirely in your browser.

Convert JSON to Excel spreadsheets (.xlsx) with a live table preview. ExcelJS runs in your browser — no upload, no server.

Your data never leaves your browser

Sheet name

Flatten nested objects

JSON input

Excel output

No tabular rows to preview.

JSON→XLSXTable previewCustom sheet nameFlatten nestedDownload .xlsx

Product list

[{"sku":"A-1","price":9.99},{"sku":"B-2","price":14.5}]

Excel workbook with columns sku, price