🔄 Client‑Side Excel to JSON Engine

Excel to JSON – Convert Spreadsheets to API‑Ready JSON

Turn any Excel file (.xlsx or .xls) into clean, structured JSON instantly. Perfect for APIs, web apps, and databases. No signup, no limits, 100% private.

🔒 100% Private – Your Excel file never leaves your device. No server uploads. No tracking.
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Drag & Drop Your Excel File Here

Supports .xlsx and .xls workbooks

Try a sample:

Why Convert Excel to JSON?

Converting Excel spreadsheets to JSON is essential for modern web development, API integration, and data migration. JSON is the universal data format for web applications – it's lightweight, hierarchical, and natively supported by every programming language. This tool lets you transform tabular data from .xlsx or .xls files into clean arrays of objects, perfect for REST APIs, NoSQL databases, and frontend frameworks like React, Vue, or Angular.

How to Use the Excel to JSON Converter

  1. Upload – drag & drop your Excel file or click to browse.
  2. Preview & Edit – the first row becomes JSON keys (toggle off if you have no header). Edit any cell directly in the table.
  3. Convert – click Convert to JSON to generate the output.
  4. Copy or Download – copy the JSON to your clipboard or download it as a .json file.

The converter preserves data types – numbers stay numbers, strings remain strings, and empty cells become null or empty values. The output is pretty‑printed for readability.

Privacy & Security

  • 🔒 All processing happens in your browser – no files are uploaded.
  • 🚫 No server interaction – everything runs locally using SheetJS.
  • 🕵️ No tracking, no logging – your data stays yours.
  • 💼 Safe for sensitive data – perfect for financial or personal spreadsheets.

Frequently Asked Questions

Does this tool support multiple sheets?

Only the first sheet is converted. You can select a different sheet from the dropdown after uploading.

Can I edit the data before conversion?

Yes – the preview table is fully editable. Change any cell, delete rows, or adjust values before generating JSON.

Is the JSON output valid and formatted?

Yes – it's valid JSON with proper indentation, ready to use in any application.