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  1. Home
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  5. Excel to JSON

Excel to JSON — Convert Spreadsheets to JSON Format

Need to convert Excel to JSON? Free tool to convert XLSX, XLS files to JSON format. Perfect for API data, web development, and data migration. Fast, secure, and 100% private — all in your browser.

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Why Use Our Excel to JSON Converter?

Multiple Output Formats

Choose from Array of Objects, Array of Arrays, Nested Objects, or Key-Value pairs

Multi-Sheet Support

Select which sheet to convert from multi-sheet Excel workbooks

First Row as Headers

Use first row as JSON keys — perfect for data exports

Pretty Print or Minify

Choose readable indented JSON or compact minified JSON for production

Smart Empty Cell Handling

Choose how to handle empty cells — null, empty string, or skip the key

Date Format Control

Convert Excel dates to ISO strings, date-only, or timestamps

100% Private

Convert Excel to JSON completely in your browser. Your data never leaves your device

Completely Free

No signup, no watermark, no limits — use our Excel to JSON converter as much as you need

How to Convert Excel to JSON — 3 Simple Steps

3 steps
01

1. Upload Your Excel File

Select XLSX, XLS, or CSV file from your device.
02

2. Choose JSON Format

Select output format (Array of Objects recommended), header row option, and other settings.
03

3. Download JSON

Click 'Convert to JSON' and download your JSON file — ready for APIs, web apps, or data processing.
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When You Need to Convert Excel to JSON

API Data Preparation
Convert Excel data to JSON for API responses and web services
Web Development
Use Excel data directly in JavaScript applications
Data Migration
Convert Excel to JSON for database imports and data migration
Configuration Files
Create JSON configuration files from Excel templates
Testing Data
Generate JSON test data from Excel spreadsheets
Business Intelligence
Transform Excel reports into JSON for BI tools

Why Use Our Excel to JSON Converter?

Most Excel to JSON converters upload your data to servers — privacy risk. Our converter works entirely in your browser: faster, safer, and completely private. Convert Excel to JSON with multiple output formats, header options, and date handling.

Multiple Output Formats

Array of Objects, Array of Arrays, Nested Objects, Key-Value pairs

Header Row Support

Use first row as JSON keys for clean data structure

Pretty Print & Minify

Readable for development, compact for production

Smart Date Handling

Convert Excel dates to ISO strings or timestamps

Empty Cell Control

Choose how to represent empty cells in JSON

Sheet Selection

Choose which sheet to convert from multi-sheet workbooks

100% Private

Your data never leaves your device. Convert Excel to JSON safely

Free Forever

No signup, no watermark, no limits — completely free to use

Excel to JSON — The Complete Guide

Need to convert Excel to JSON? JSON (JavaScript Object Notation) is the standard data format for web APIs, configuration files, and data exchange. Excel spreadsheets (XLSX, XLS) are great for data storage but need conversion for web use. Converting Excel to JSON allows you to use spreadsheet data in web applications, APIs, and JavaScript frameworks. Our free Excel to JSON converter supports multiple output formats, header row detection, date handling, and empty cell control — all 100% private.

Excel to JSON Output Formats Explained

Our Excel to JSON converter offers multiple output formats: • Array of Objects — Each row becomes an object with column headers as keys. Recommended for most use cases. • Array of Arrays — Each row becomes an array. Compact format for simple data. • Nested Objects — Group data by a key column (e.g., by category). • Key-Value Pairs — First row as keys, second row as values. Choose the format that best fits your application when you convert Excel to JSON.

Using First Row as Headers

When you convert Excel to JSON, enabling 'First Row as Headers': • First row values become JSON object keys • Each subsequent row becomes an object • Example: [{"Name":"John","Age":30}, ...] This is the most common and useful format for converting Excel to JSON.

Excel Date Handling in JSON Conversion

Excel stores dates as serial numbers. Our Excel to JSON converter handles dates intelligently: • ISO String — Standard format for APIs (2024-01-01T00:00:00.000Z) • Date Only — Just the date part (2024-01-01) • Unix Timestamp — Seconds since 1970 Choose the right date format for your application when you convert Excel to JSON.

Handling Empty Cells in Excel to JSON

When you convert Excel to JSON, empty cells need special handling: • null — Standard JSON null value • Empty string ("") — Empty text • Skip key — Omit the key entirely Choose the option that best fits your data structure when you convert Excel to JSON.

Private Excel to JSON Conversion — No Server Uploads

Most online Excel to JSON converters upload your data to servers — your sensitive business data, customer information, and financial records end up on unknown servers. Our tool processes everything locally in your browser. When you convert Excel to JSON with us, your data never leaves your device — safe for confidential business data.

Start Converting: Convert Excel to JSON Today

Turn Excel spreadsheets into JSON data for web applications and APIs. Use our free Excel to JSON converter — multiple output formats, header options, date handling, empty cell control, and 100% private. Perfect for developers, data analysts, and web applications. 100% free, private, and no signup required.

Frequently Asked Questions About Excel to JSON Conversion

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