How to convert JSON to XLSX
- Choose or drop your JSON files. You can add several at once.
- Check that “To” is set to XLSX.
- Press “Convert to XLSX” and download the results — or all of them as one ZIP.
JSON vs XLSX
JSON — JavaScript Object Notation. JSON is the standard data format of web APIs and JavaScript. Rows become a list of objects, each keyed by the column headers.
XLSX — Excel workbook. XLSX is the Microsoft Excel format. A workbook can hold several sheets with formatting and formulas, and it opens in Google Sheets, Numbers and LibreOffice.
Convert JSON to XLSX when you need a file for spreadsheets people will open and edit. JSON is better suited to developers, APIs and web apps.
FAQ
5Are my files uploaded anywhere?
No. The conversion runs in your browser using your own device’s processor. Your files are never sent to a server, so nobody — including us — can see them. You can even disconnect from the internet after the page loads.
Will I lose quality?
JSON must be a list of objects (or an object of such lists, one per sheet). Keys become column headers. The result opens in Excel, Google Sheets, Numbers and LibreOffice.
Is there a file size or daily limit?
No limits, and no sign-up. Because nothing is uploaded, we don’t pay for your conversions and have no reason to cap them. Very large files are limited only by your device’s memory.
Can I convert many JSON files at once?
Yes. Add as many files as you like; each is converted to XLSX, and “Download all” saves them together as a ZIP.
Does it work on iPhone and Android?
Yes. It works in any modern browser — Safari, Chrome, Firefox or Edge — on phones, tablets and computers. Older or low-memory phones may be slower with very large files.