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Excel to JSON

Convert Excel spreadsheets (.xlsx/.xls) to JSON data, supporting object array and two-dimensional array output, with the ability to merge multiple worksheets. All processing is done locally in the browser without the need to upload files.

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Drag files here orclick to upload

2 files, max 5M each

Output Structure

Pretty Print

Multi-sheet Handling

No files yet

About this tool

Excel to JSON is an online Excel to JSON converter with a free daily quota — no installation, no registration, ready to use. It intelligently converts Excel spreadsheets (.xlsx / .xls) into JSON data, supporting both object-array and 2D-array output and merging multiple worksheets. All processing is done entirely in your browser, 100% protecting your privacy — files are never uploaded to any server. Whether for API development, data migration, or automation, it handles it with ease, delivering results comparable to professional data-processing tools.

How to Use

Upload files
Click the upload area or drag and drop an Excel file; .xlsx / .xls formats are supported
Set parameters
In the parameter panel, choose the output structure, multi-sheet handling and pretty print options
Download results
Click the "Start" button and download the JSON file when conversion finishes

Use Cases

API development: quickly turn test data in Excel into JSON for interface debugging and Mocking
Data migration: convert business table data into JSON for importing into databases or frontend projects
Automation: batch-convert Excel into JSON for scripts or programs to read and process

Key Advantages

Free Daily Quota
A free daily quota is provided for everyday light needs; for higher or professional use, upgrade to membership to unlock more
Privacy & Security
All conversion runs entirely in your browser; files are never uploaded to any server and your data stays on your device
Flexible Structure
Supports both object-array and 2D-array output structures to fit different consumption scenarios
Accurate Types
Automatically preserves the original types of dates, numbers and booleans, ensuring JSON can be parsed correctly by programs
Batch & Efficient
Supports batch upload of multiple files; each is converted independently and can be downloaded individually or as a ZIP

Output Structure Explained

This tool offers two output structures so you can choose the best format for your downstream consumption:

Output Structure	Data Format	Best For
Object array (header as key)	Uses the first row as field names and turns each row into a JSON object, e.g. [{ "name":"John", "age":25 }, ...]	Best for APIs and programs, with clear field semantics
2D array (raw rows)	Keeps the full row/column layout as [[header...],[data...],...]	Suitable when you need the raw structure and handle headers yourself

FAQ

What is the Excel to JSON tool?

Excel to JSON is a tool that converts Excel spreadsheets into JSON data. It turns .xlsx / .xls files into well-structured JSON, supporting object-array and 2D-array output and merging multiple worksheets — all processed locally in your browser.

How do I use the Excel to JSON converter?

It only takes three steps. First upload or drag an Excel file, then choose the output structure and multi-sheet handling in the parameter panel, and finally click "Start" and download the JSON file.

Which Excel formats are supported?

.xlsx and .xls formats are supported; .xlsx is recommended for the best compatibility.

Is the header used as the key in object-array mode?

Yes. In "Object array (header as key)" mode, the tool uses the first row as field names and converts each row into a JSON object; if a column has no header, a placeholder key is auto-generated.

How are multiple worksheets handled?

By default the tool merges all worksheets into an object keyed by sheet name; you can also choose "First sheet only". A single-sheet file is output directly in the chosen structure.

Are dates and special types preserved?

Yes. The tool preserves the original types of dates, numbers and booleans (dates become a standard format, numbers keep full precision). Empty null cells are represented as null, ensuring the JSON can be parsed correctly by programs.

Is batch conversion supported?

Yes. Multiple files can be uploaded in batch; each is independently converted to JSON and can be downloaded individually or as a ZIP.

Is there a file size limit?

Regular-sized Excel files are supported. For very large files, consider removing irrelevant data before conversion. The exact limits follow your membership benefits; the free quota already covers daily use.

Is this better than writing JSON by hand?

This tool saves time and reduces errors. It automatically parses the Excel structure and produces clean, standard JSON, avoiding the formatting mistakes of manual writing — especially useful for batch data and complex tables.

Can I use it on a phone or tablet?

Yes. As a web app, it works in browsers on phones, tablets, and computers, so you can convert anytime, anywhere.

What if conversion fails or returns empty results?

Try refreshing the page first. Make sure the file is not an encrypted or corrupted Excel; if needed, save it as .xlsx and re-upload. You can also try another browser before converting again.

Is the processing secure? Do I need to register?

Files are processed entirely in your browser — no registration required. Nothing is uploaded to any server and your data stays on your device. Feel free to use with confidence.

Content last updated：2026-07-16

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Excel to JSON