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JSON to XLSX

Convert JSON to XLSX free, in seconds. Paste your data below, press Convert, then copy the result and download a real spreadsheet file. Everything runs in your browser, so nothing is ever uploaded.

JSON input

Paste your JSON below, then press Convert.

Tip: arrays of objects convert best. A single object becomes one row.

XLSX output

Waiting for JSON input.

Private by design: conversion runs entirely in your browser with built-in code, so your data never leaves your device. The spreadsheet library loads once from a CDN.
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How this conversion works

Paste JSON into the input box and press Convert (or just keep typing, conversion happens as you type). The tool parses it with the browser's native JSON parser, then builds a genuine .xlsx workbook with the SheetJS library and offers it as a download. Conversion runs entirely in your browser with built-in code, so your data never leaves your device.

About the spreadsheet

The SheetJS library builds a real .xlsx workbook entirely in your browser: one sheet named Sheet1, with your column names as the header row and one row per record. Press Download to save converted.xlsx, which opens in Excel, Google Sheets and LibreOffice. The sheet carries your data only, without styling or formulas, and handles thousands of rows comfortably.

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JSON to XLSX FAQs

Why convert JSON to XLSX?
XLSX is the format Excel, Google Sheets and LibreOffice open natively. Converting gives you a genuine spreadsheet file you can email, share and edit, which is far friendlier than raw data for non-technical colleagues.
How is my JSON parsed?
With the browser's native JSON parser, so even large documents convert fast. An array of objects becomes one row per object, a single object becomes a single row, and nested values are flattened with dot notation (for example contact.city).
How is the file created?
The SheetJS library builds a real .xlsx workbook entirely in your browser: one sheet with your column names as the header row. Press Download to save converted.xlsx; no server is ever involved.
Are there formatting or size limits?
The sheet contains your data with a header row, without styling or formulas. It handles thousands of rows comfortably, though extremely large exports may take a few seconds to build.
Is my data sent to a server?
No. conversion runs entirely in your browser with built-in code, so your data never leaves your device. The spreadsheet library loads once from a CDN, and your data never leaves your device.
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