Convert XLSX to JSON Online

Turn an Excel sheet into clean JSON. The conversion runs locally in your browser, so your XLSX never leaves your device.

Your file never leaves your device.

How to convert XLSX to JSON

The first row of the first worksheet becomes the JSON keys and every row below it becomes an object. The output drops straight into your app, API, database or LLM prompt as structured data.

Step 1: Add your XLSX
Drop the .xlsx file onto the converter or click to browse.
Step 2: Convert locally
Azpy's engine maps rows to objects right in your browser. Nothing is uploaded.
Step 3: Copy or download
Download the .json file or copy the result straight into your code.

Good to know

The first row is used as field names, and every following row becomes one record.
Each sheet is exported in order, so multi-sheet workbooks keep all their data.

Why use this XLSX to JSON converter?

Feeds any app, API, database or LLM, JSON is the standard format for structured data.
100% private, the conversion happens in your browser, no upload, no servers.
Instant: no queue, no email, no waiting. Conversion starts the moment you drop the file.
Free forever with no watermarks, plus batch conversion on Pro.

Is it free?

Yes. XLSX to JSON conversion is completely free, with no watermarks and no limits on normal use.

Is my file uploaded?

XLSX to JSON runs entirely in your browser. Your file is never uploaded and never leaves your device.

About the formats

What is XLSX?

XLSX (Excel Open XML) is the standard spreadsheet format from Microsoft Excel, also supported by Google Sheets and LibreOffice Calc. Data is organised into cells and sheets, with support for formulas, functions, charts and formatting. Because the file is a ZIP container of XML, its content stays readable and easy to process.

Use XLSX for tabular data that needs structure and calculation, budgets, inventories, lists and anything with formulas or multiple sheets. When you only need the raw data, you can export a single sheet to CSV or JSON here.

Excel Spreadsheet (XLSX)

What is JSON?

JSON (JavaScript Object Notation) is a lightweight format for storing and exchanging data as collections of key-value pairs. It grew out of JavaScript but is now supported by nearly every programming language. JSON is the de facto standard for APIs, configuration files and structured data.

Use JSON when machines exchange data, REST APIs, web apps, configuration and tool settings. Its predictable structure makes it easy to parse, so it is the natural choice whenever data needs to be read by software.

JSON (JavaScript Object Notation)