What Is JSON Format?

JSON (JavaScript Object Notation) is a lightweight data-interchange format used extensively in web development, APIs, mobile applications and cloud platforms. It stores data as key–value pairs and arrays, making it both human-readable and machine-readable.

Why Developers Convert Excel to JSON

Excel files are ideal for data entry, but software systems cannot consume Excel directly. JSON acts as a bridge between spreadsheet data and programming languages such as JavaScript, Python, Java, PHP and Node.js.

JSON Structure Generated by This Tool

Each Excel row becomes a JSON object, and column headers become keys. The final output is an array of objects, which is the most commonly used API format.

Example Output

[
  {
    "Name": "anu",
    "Age": 22,
    "City": "delhi"
  },
  {
    "Name": "Ravi",
    "Age": 25,
    "City": "Mumbai"
  }
]

Supports Clean Data Conversion

Empty cells are converted safely, duplicate headers are normalized, and data types are preserved accurately wherever possible.

Common Excel to JSON Use Cases

REST API data upload
Frontend application datasets
Database import scripts
Mobile app configuration files
Static website data rendering

Large Excel Files Supported

The converter can handle thousands of rows depending on browser memory and device performance.

No Software Installation Required

Everything runs directly inside your browser. Microsoft Excel, Office or developer tools are not required.

100% Secure & Client-Side Processing

Your Excel file is processed locally using JavaScript. Files are never uploaded to any server, ensuring complete privacy and confidentiality.

Frequently Asked Questions

Is Excel to JSON converter free?
Yes, unlimited conversions are free.

Are Excel files uploaded?
No. All processing happens locally.

Does it support XLS and XLSX?
Yes, both formats are supported.

Can I convert multiple sheets?
Currently the first worksheet is converted.

Excel to JSON Converter Online Free