Excel to JSON Converter

Excel to JSON Converter Guide

Use this free online Excel to JSON converter to turn .xlsx or .xls spreadsheets into clean JSON arrays and objects. It is ideal when you need to move data from Excel to APIs, NoSQL databases, configuration files, or JavaScript applications.

Why convert Excel to JSON?

• API-ready data: Convert Excel sheets into JSON payloads you can send directly to REST or GraphQL APIs.
• Developer-friendly format: JSON is the native data format for JavaScript, Node.js, and modern web apps.
• Database import: Quickly prepare data for NoSQL databases like MongoDB, Firestore, or Elasticsearch.
• Automation & integration: Use JSON in ETL pipelines, low-code tools, or serverless workflows.

Key features

• Excel support: Upload .xlsx and .xls files from any version of Microsoft Excel.
• Header detection: Treat the first row as column headers or generate numeric keys.
• Multiple sheets: Choose which worksheet to convert when your file has several tabs.
• Pretty print: Toggle human‑readable, indented JSON or compact JSON for production.
• Instant preview: The JSON output updates automatically when you change options.
• Copy & download: Copy to clipboard or download the result as a .json file.
• 100% browser-based: Conversion runs locally in your browser, no upload required.

How to use the Excel to JSON converter

1. Upload your Excel file: Click the upload area or drag and drop your .xlsx or .xls file into the box.
2. Select the sheet: If your workbook has multiple sheets, pick the worksheet you want to convert from the Sheet dropdown.
3. Configure headers: Enable First row is header if your first row contains column names. Disable it to output JSON arrays instead of objects.
4. Choose formatting: Turn Pretty print on for easier reading, or off for minified JSON.
5. Review the JSON output: Inspect the generated JSON in the right panel. Make sure field names and values look correct.
6. Copy or download: Click Copy to send the JSON to your clipboard, or Download to save it as a .json file.

Examples

Example 1 – Excel table with headers to JSON objects

Input Excel sheet:

• Row 1: Name | Age | City
• Row 2: Alice | 30 | London
• Row 3: Bob | 25 | New York

With First row is header enabled, the JSON output looks like:

[
  { "Name": "Alice", "Age": 30, "City": "London" },
  { "Name": "Bob",   "Age": 25, "City": "New York" }
]

Example 2 – Excel without headers to JSON arrays

Input Excel sheet:

• Row 1: 1 | 2 | 3
• Row 2: 4 | 5 | 6

With First row is header disabled, the JSON output becomes:

[
  [1, 2, 3],
  [4, 5, 6]
]

Typical use cases

• Import Excel data into a web application that expects JSON.
• Prepare seed data for databases, fixtures, or configuration files.
• Share structured data with developers, data scientists, or API consumers.
• Build quick prototypes by converting existing spreadsheets into JSON APIs.

FAQ – Excel to JSON

Is this Excel to JSON converter free?

Yes. This tool is completely free to use and does not require registration.

Is my Excel file uploaded to your server?

No. All conversions run entirely in your browser using JavaScript. Your Excel to JSON conversion is private and your data never leaves your device.

What file types are supported?

You can upload .xlsx and .xls files exported from Microsoft Excel, Google Sheets, LibreOffice, or other spreadsheet tools.

How are blank cells handled?

Empty cells are exported as empty strings or omitted values depending on the underlying Excel data. You can edit the JSON output manually if you need a specific representation like null.

Can I convert large Excel files to JSON?

The converter works in the browser, so performance depends on your device and browser. For very large Excel files, consider splitting them into smaller sheets before converting to JSON.