Developer Tools

Convert Excel to JSON Online | Free & Secure

Convert Excel files (.xlsx, .xls) to JSON online, with support for multiple sheets and large files. Secure client-side conversion, no upload needed.

Excel File

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JSON Output

JSON result will appear here...

JSON FormatterCopyDownload

JSON result will appear here...

How to Convert Excel to JSON

01

Upload your Excel file (.xlsx, .xls).

02

The tool automatically extracts data from the first sheet.

03

Copy the JSON result or download it as a .json file.

Key Features

Client-Side Processing

Your Excel data is processed locally in your browser. No data is uploaded to any server.

Supports Modern Formats

Compatible with .xlsx, .xls, and other spreadsheet formats supported by SheetJS.

Instant Conversion

Get structured JSON data from your spreadsheets in milliseconds.

FAQ

Is it free?

Yes, this tool is completely free to use.

Does it support multiple sheets?

Currently, it converts the first sheet of the workbook by default.

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Upload an Excel workbook (.xlsx or .xls) and this tool instantly converts its rows into a structured JSON array—each row becomes an object keyed by the column headers in the first sheet. Everything is parsed locally in your browser with SheetJS, so your spreadsheet never leaves your device and no file is uploaded to a server.

How to Convert Excel to JSON

  1. 1

    Upload your Excel file

    Choose or drag in a .xlsx or .xls workbook. Files are read directly in the browser, so nothing is sent to a server.

  2. 2

    Let the tool parse the first sheet

    The parser reads the active worksheet, treats the top row as column headers, and maps each subsequent row to a JSON object.

  3. 3

    Review the JSON output

    Inspect the resulting array of objects in the output panel, where each cell value is mapped to its matching header key.

  4. 4

    Copy or download

    Copy the JSON to your clipboard or download it as a .json file to use in your code, API, or database import.

References

  • ECMA-376 — Office Open XML

    The official ECMA standard defining the Office Open XML (.xlsx) workbook format that this tool reads.

  • RFC 8259 — JSON

    The IETF specification for the JSON data interchange format produced as the tool's output.

Related Tools

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Convert JSON arrays back into a downloadable Excel spreadsheet.

CSV to JSON

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JSON Formatter

Beautify, validate, and format the JSON output from your spreadsheet.

JSON to CSV

Flatten JSON arrays into CSV for spreadsheets and data tools.

Frequently Asked Questions

Is it free?
Yes, this tool is completely free to use with no sign-up, usage limits, or watermarks.
Does it support multiple sheets?
Currently, it converts the first sheet of the workbook by default. To convert a different sheet, move it to the front of the workbook before uploading.
Which Excel file formats are supported?
The converter accepts modern .xlsx files as well as legacy .xls files and other spreadsheet formats handled by the SheetJS engine.
Is my Excel data uploaded to a server?
No. Parsing runs entirely in your browser, so your spreadsheet and its contents never leave your device.
How are column headers handled?
The first row of the sheet is treated as the header row, and each value in that row becomes a key in the JSON objects generated for the remaining rows.