How to Convert Excel to JSON Free — Spreadsheet to JSON Online

Why Convert Excel to JSON?

JSON is the language of web development. APIs consume it, databases store it, JavaScript speaks it natively. When business teams hand you data in Excel, converting to JSON is usually the first step before it hits any codebase. Doing this in the browser means no Python scripts, no command-line tools, no dependencies.

How to Convert Excel to JSON

1. Open the Excel to JSON tool
2. Drop your .xlsx or .xls file
3. The first row becomes JSON keys, subsequent rows become objects
4. Copy the JSON or download it as a .json file

Your spreadsheet never leaves your browser. Zero server processing.

How the Conversion Works

The tool uses the first row as property names. Each subsequent row becomes a JSON object. A spreadsheet with columns "name", "email", "plan" produces an array of objects like:

[{"name": "Acme Gym", "email": "[email protected]", "plan": "VIP"}]

Numbers stay as numbers, not strings. Empty cells become null. The output is valid, parseable JSON ready for any API or database.

Common Developer Use Cases

• Seeding databases — convert a product catalog spreadsheet to JSON for MongoDB or Firestore
• API mock data — turn test data spreadsheets into JSON fixtures
• Config files — convert settings from a business-friendly spreadsheet to JSON config
• Migration scripts — export legacy system data from Excel to JSON for import