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Excel to JSON Converter

Convert Excel spreadsheets and CSV files to JSON format. Parse .xlsx, .xls, and .csv with header detection.

Drag & drop Excel or CSV file here or

Upload an Excel or CSV file to convert

Spreadsheet to JSON Made Easy

Convert Excel files and CSV data into clean JSON arrays instantly. Perfect for importing data into web applications, APIs, databases, and data processing pipelines.

Multi-Format Support

Why Use This Converter?

Multiple Sheets

Handle multi-sheet Excel workbooks with easy sheet selector.

Clean JSON Output

Get properly formatted JSON with pretty print or minified options.

Smart Headers

Auto-detect header rows or use column numbers as keys.

Privacy First

All conversion happens in your browser. Files never leave your device.

How this Excel to JSON Converter works

This spreadsheet converter transforms Excel files (.xlsx, .xls) and CSV data into structured JSON arrays using the SheetJS library. The parser reads uploaded files into memory, extracts cell values while respecting data types (numbers, strings, dates), and outputs clean JSON objects suitable for API consumption, database imports, or data processing pipelines.

Multi-sheet Excel workbooks display a selector choosing which worksheet to convert, with row counts indicating data volume. Header row detection uses the first row as JSON object keys, creating meaningful property names instead of generic Column1, Column2 indices. When disabled, auto-generated column names accommodate headerless data.

Data preview shows the first 10 rows in tabular format before conversion, enabling verification of parsing accuracy. JSON output offers pretty-printed or minified formatting. Copy and download actions export converted data for immediate use. All file processing occurs client-side through browser JavaScript—spreadsheets never upload to any server, ensuring complete privacy for sensitive business data.

How to Use

1

Upload File

Drag & drop or select an Excel (.xlsx, .xls) or CSV file.

2

Configure Options

Toggle header row detection and JSON formatting preferences.

3

Export JSON

Copy to clipboard or download the converted JSON data.

Example Usage

Sample Excel to JSON conversion:

Input
Excel with columns: Name, Age, City
Output
[{"Name":"John","Age":25,"City":"NYC"}]

Frequently Asked Questions

What file formats are supported?
This tool supports .xlsx (Excel 2007+), .xls (Excel 97-2003), and .csv (comma-separated values) files.
How does header row detection work?
When enabled, the first row is used as JSON object keys. Disable it if your data doesn't have headers and you want auto-generated column names.
Can I convert multiple sheets?
Yes! If your Excel file has multiple sheets, you can select each sheet from the dropdown and convert them individually.
Is my data safe?
Absolutely! All processing happens in your browser. Your files are never uploaded to any server.
What about large files?
The tool handles reasonably large files well. For extremely large datasets, consider splitting them for better performance.

Related Tools

JSON Formatter

Beautify and validate JSON data.

CSV to JSON Converter

Convert CSV files or text into valid JSON arrays. Smart parsing with header detection.

The Excel to JSON Converter is maintained by CodeItBro. We aim to provide the best free developer tools on the web. If you have feedback or suggestions, please visit our contact page.