Convert a JSON array to an Excel workbook locally - object keys become columns, no upload.
Running locally on your device ...
Running locally on your device ...
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No re-upload neededThese tools accept .XLSX - your file is handed over directly.
No. Everything runs in your browser - your file never leaves your device. How this is verifiable
API responses and exports almost always arrive as JSON - but a business team or a report often needs an Excel workbook that opens, filters and sorts without a developer tool.
This tool reads your JSON entirely locally in the browser (SheetJS, pure JavaScript). A plain array of objects becomes one sheet; an object containing several such arrays (in the shape {"sheetName": [...]}) becomes a workbook with one sheet per key. Numbers and booleans stay real Excel cells, not a text approximation.
Nothing is uploaded - the conversion even works offline. Unlike web services that send JSON data to a server, your file stays exclusively on your device.
| Input formats | JSON |
|---|---|
| Auto-conversion | XLSX, SQLite |
| Output format | XLSX |
| Batch processing | No |
| Processing | Locally in your browser (JavaScript) |
| File upload | None |
Limitations: Expects an array of objects (one sheet) or an object whose values are themselves arrays (one sheet per key). Column names are the union of the object keys. No cell formatting, charts or formulas (JSON has no such concepts). Very large files need memory.
No. The Excel workbook is built entirely locally in the browser.
An object whose values are themselves arrays, e.g. {"customers":[...], "orders":[...]} - each key becomes a sheet.
Yes, JSON numbers are written as real Excel number cells.
Yes, use the "XLSX to JSON" tool.
Yes, it is a standards-compliant .xlsx.