Excel to JSON Converter
Convert any Excel spreadsheet to JSON instantly. Choose whether to use the first row as object keys, preview the output, and copy to clipboard or download. Your file never leaves your browser.
Drop your Excel file here
or click to browse — .xlsx, .xls, .xlsm, .xlsb
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How to Convert Excel to JSON
Upload your file
Drag and drop your .xlsx or .xls file. If the workbook has multiple sheets, a sheet selector appears so you can pick which one to convert.
Configure the output
Choose "First row as keys" to get an array of objects ({"Name":"John"}). Toggle pretty print for readable output, or minified for the smallest file size.
Copy or download
Click "Copy JSON" to copy to clipboard, or "Download .json" to save the file. Repeat for each sheet you need.
When to Convert Excel to JSON
JSON (JavaScript Object Notation) is the standard data format for web APIs, databases, and JavaScript applications. Converting Excel data to JSON is a common step in software development and data engineering workflows:
- Seeding a database: Convert a spreadsheet of products, users, or settings directly to JSON for a MongoDB, Firebase, or PostgreSQL (via JSON import) insert. If you need SQL INSERT statements instead, use the Excel to SQL Converter.
- Building an API: Turn a spreadsheet maintained by a business team into a JSON data source for a REST or GraphQL API without needing a database layer.
- Configuration files: Export structured Excel tables to JSON config files consumed by applications or CI/CD pipelines.
- Frontend data: JavaScript charting libraries like Chart.js, D3, and Recharts consume JSON directly — export your data and paste it into your project.
- Data migration: Convert legacy spreadsheet data to JSON for import into a modern system or data warehouse.
If you need a different output format, try the Excel to SQL Converter, Excel to XML Converter, or Excel to CSV Converter instead.
Frequently Asked Questions
What does "First row as keys" mean?
When enabled, the first row of your spreadsheet is used as the property names (keys) in each JSON object. For example, if your columns are Name, Email, Age — each row becomes {"Name":"John","Email":"john@example.com","Age":30}. When disabled, each row becomes a plain array like ["John","john@example.com",30].
What is the difference between pretty print and minified?
Pretty print adds indentation and line breaks to make the JSON human-readable. Minified removes all whitespace to produce the smallest possible file — useful for APIs and data pipelines that do not need readable output.
Are my files uploaded to a server?
No. Everything runs in your browser. Your file never leaves your device.
What data types are preserved?
Numbers are preserved as numbers (not strings), and blank cells are skipped when the "Skip empty cells" option is on. Date cells are converted to date strings. Everything else is preserved as its original value.
Can I convert multiple sheets?
Yes — if your file has multiple sheets, use the sheet selector that appears after upload to switch between sheets and download a separate JSON for each.
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