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Excel to JSON Converter - Convert XLSX XLS to JSON Online

Free online Excel to JSON converter that safely converts Excel spreadsheets (.xlsx, .xls) to JSON format in your browser. No files uploaded to servers, works offline, supports multiple sheets and custom formatting options.

Excel File Upload

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Drop Excel file here or click to browse

Supports .xlsx, .xls, and .ods files up to 25MB

JSON Output

Upload an Excel file and click "Convert to JSON" to see the results.

✅ No file upload to servers
✅ Works completely offline
✅ Supports files up to 25MB

How It Works

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Upload Your Excel File

Select an Excel file (.xlsx, .xls) or OpenDocument Spreadsheet (.ods) from your computer (up to 25MB). The file is processed entirely in your browser - no upload to servers required.

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Configure Conversion Options

Choose conversion settings: include/exclude empty rows and columns, use first row as headers, select specific sheets, and pick output format (array, object, or nested with metadata).

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Convert to JSON Instantly

Click 'Convert to JSON' to process your Excel file using SheetJS technology. Data is converted with type preservation, date formatting, and whitespace trimming as configured.

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Download or Copy Results

Copy JSON data to clipboard or download as a .json file. Perfect for API development, data migration, database imports, and web application integration.

Frequently Asked Questions

Is this Excel to JSON converter free to use?

Yes, this Excel to JSON converter is completely free with no limits on the number of files you can convert. No registration required, and no watermarks added to converted data.

Are my Excel files uploaded to your servers?

No, all Excel processing happens locally in your browser using SheetJS technology. Your files never leave your computer, ensuring complete privacy and security for sensitive business data.

What Excel file formats are supported?

Supports Excel files (.xlsx, .xls) and OpenDocument Spreadsheets (.ods). Maximum file size is 25MB to ensure optimal browser performance during conversion.

Can I convert multiple sheets from one Excel file?

Yes, you can convert all sheets, just the first sheet, or a specific sheet by name. Multi-sheet conversions include metadata about each sheet and its structure.

How are Excel data types handled in JSON?

Numbers remain as numbers, text as strings, dates can be converted to ISO format or timestamps, and formulas are converted to their calculated values. Empty cells can be included or excluded based on your settings.

What if my Excel file has merged cells or complex formatting?

The converter focuses on data extraction and may not preserve complex formatting or merged cell structures. It works best with tabular data where each row represents a record.

Can I use the first row as column headers?

Yes, you can enable "First row as headers" to use the first row values as JSON object keys. If disabled, columns will be named automatically (A, B, C, etc.).

What output formats are available?

Choose from Array (simple JSON array), Object (JSON objects with headers), or Nested (includes metadata about sheets, rows, and conversion settings). Pick the format that best fits your use case.

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