Excel to JSON Guide: Read .xlsx Files and Export Structured Data
Convert Excel XLSX files to JSON using SheetJS in the browser or openpyxl in Python. Handle merged cells, multiple sheets, and date formats.
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Tags: excel, json, data
Excel to JSON Guide: Read .xlsx Files and Export Structured Data Excel files are everywhere. Finance teams, operations, product managers — everyone exports .xlsx. As a developer, you need to read those files programmatically and convert them to JSON for APIs, databases, or downstream processing. This guide covers every serious approach: SheetJS in the browser and Node.js, Python with openpyxl and pandas, handling multiple sheets, preserving data types, and dealing with formula cells. SheetJS in the Browser SheetJS (xlsx package) is the most widely used library for Excel parsing in JavaScript. It runs in both browsers and Node.js with the same API. Install: Basic Browser Usage The function uses the first row as keys by default. Each subsequent row becomes an object. Reading All Sheets This…
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