File & internet

JSON to XLSX

Create an Excel workbook from a JSON array of records without uploading it. Nothing you enter leaves your browser.

Paste a JSON array of objects

Your content is converted locally and prepared as a download.

Result

Your result will appear here.

Simple by design

Get the answer, without the clutter.

FormatCalc is built for quick work. This json to xlsx runs entirely on your device, so private text and data stay private.

01

Choose a file or paste its Base64 data.

02

Transform it with one click.

03

Copy, use, or download your result.

Common questions

Using the JSON to XLSX

Is the JSON to XLSX free to use?

Yes. FormatCalc's JSON to XLSX is free to use with no account required.

Is my data private when I use the JSON to XLSX?

Yes. This tool processes your input locally in your browser. FormatCalc does not upload or store what you enter.

How do I use the JSON to XLSX?

Choose or paste your file data, then choose Create XLSX. The conversion stays on your device.