Convert Excel to JSON instantly

Convert Excel XLSX files to JSON in your browser. No upload, no server. Your spreadsheets stay on your device.

Drop your XLSX file here

or click to browse

Your files stay private
No server upload
Instant conversion

Example

Input (XLSX)

[inventory.xlsx]
Excel spreadsheet with product data
File size: 32 KB

Output (JSON)

[
  { "product": "Widget A", "stock": 150, "price": 12.99 },
  { "product": "Widget B", "stock": 85, "price": 24.50 }
]

About this converter

Developers frequently need to pull data from Excel into JavaScript, Python, or an API payload. This converter reads your XLSX file using SheetJS, takes the first sheet, and outputs a JSON array of objects where column headers become keys. The conversion runs entirely in your browser. Your spreadsheet data is not sent to any server. The output is clean, formatted JSON ready to paste into code or save as a .json file.

XLSX vs JSON

Microsoft Excel Spreadsheet (XLSX)

XLSX is the default spreadsheet format for Microsoft Excel (2007 and later). It stores data, formulas, charts, and formatting in a compressed XML-based container.

Common uses: spreadsheets, financial reports, data analysis, and business reporting

JavaScript Object Notation (JSON)

JSON (JavaScript Object Notation) is a lightweight data format that is easy for humans to read and write, and easy for machines to parse and generate.

Common uses: APIs, web applications, and configuration files

ECMA-404 (JSON specification)

How to convert XLSX to JSON

  1. 1

    Upload

    Upload your XLSX file using the drop zone above, or click to browse your device.

  2. 2

    Convert

    Click the "Convert to JSON" button. The conversion runs instantly in your browser.

  3. 3

    Download

    Download your converted JSON file. No data was sent to any server.

Frequently Asked Questions

Last updated: 2026-03-23