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JSON to Excel Converter - Convert JSON to XLSX CSV Online

Free online JSON to Excel converter that safely converts JSON data to Excel spreadsheets (.xlsx) or CSV format in your browser. No files uploaded to servers, works offline, supports nested object flattening and custom formatting options.

JSON Input

Conversion Results

Enter JSON data above and click "Convert to Excel" to generate your file.

✅ No data upload to servers
✅ Works completely offline
✅ Supports nested objects and arrays

Conversion Options
Basic Options:
Object Handling:
Data Formatting:

How It Works

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Paste Your JSON Data

Enter your JSON data in the input area - supports objects, arrays, and nested structures. Data is validated and processed entirely in your browser with no server uploads.

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Configure Export Options

Choose output format (Excel XLSX or CSV), enable object flattening for nested data, configure headers, sheet names, and array handling options to match your needs.

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Generate Excel File

Click 'Convert to Excel' to process your JSON using SheetJS technology. Nested objects are flattened, arrays are handled according to your settings, and data types are preserved.

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Download Your File

Download the generated Excel (.xlsx) or CSV file directly to your computer. Perfect for data analysis, reporting, database imports, and sharing with non-technical stakeholders.

Frequently Asked Questions

Is this JSON to Excel converter free to use?
Yes, this JSON to Excel converter is completely free with no limits on the size or complexity of JSON data you can convert. No registration required, and no watermarks added to generated files.
Are my JSON files uploaded to your servers?
No, all JSON processing happens locally in your browser using SheetJS technology. Your data never leaves your computer, ensuring complete privacy and security for sensitive business information.
What JSON formats are supported?
Supports any valid JSON including objects, arrays, nested structures, and mixed data types. Works best with arrays of objects or single objects that can be converted to tabular format.
How are nested objects handled?
Nested objects can be automatically flattened using dot notation (e.g., user.profile.name). You can control the flattening depth and disable it to keep nested data as-is if preferred.
What happens to arrays in the JSON data?
Arrays can be joined with a separator (default), separated into individual columns, or ignored. Choose the option that best fits your data structure and analysis needs.
Can I export to CSV instead of Excel?
Yes, you can choose between Excel (.xlsx) and CSV formats. CSV is useful for importing into other tools, while Excel preserves formatting and supports multiple sheets.
How are different data types handled?
Strings remain as text, numbers as numeric values, booleans as TRUE/FALSE, dates in configurable formats, and null values as empty cells or custom values based on your settings.
What if my JSON has missing or inconsistent fields?
The converter handles missing fields gracefully by creating empty cells. Inconsistent structures are normalized, and all unique fields across objects become columns in the output.

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