1
Upload XLSXChoose the XLSX file you want to convert.
2
Review File
3
Convert to JSON
4
Download JSON
spreadsheet Converter• 100% Client-Side

XLSX to JSON Converter

Turn Excel rows into structured JSON API payloads.

xlsx→json

Drop XLSX file(s) here, or browse

Supports single or multiple batch conversion

Private by Design

Your files are processed directly on your device using WebAssembly, HTML5 Canvas, and client-side runtimes.

No server upload No cloud copy 100% local processing
How To Convert

How to Convert XLSX to JSON

Step 1

Upload XLSX

Choose the XLSX file you want to convert.

Step 2

Review File

Check the file information and conversion options.

Step 3

Convert to JSON

Start the local XLSX to JSON conversion.

Step 4

Download JSON

Download your converted JSON file.

Frequently Asked Questions

Questions about XLSX to JSON Conversion

How are columns named?

The first header row of the spreadsheet supplies the JSON property keys.

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