JSON to Excel Guide: Export Data to .xlsx With Headers and Formatting
Export JSON data to Excel XLSX files using SheetJS or openpyxl. Add headers, freeze rows, set column widths, and apply cell formatting.
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Tags: data, json, excel
JSON to Excel Guide: Export Data to .xlsx With Headers and Formatting Exporting JSON to Excel is more involved than exporting to CSV. CSV is plain text — Excel adds cell formatting, column widths, data types, multiple sheets, and formulas. This guide covers the two main approaches — SheetJS in JavaScript and openpyxl in Python — plus specific techniques for headers, auto-fit column widths, and multi-sheet workbooks. Browser: SheetJS (xlsx) SheetJS ( on npm) is the de-facto JavaScript library for Excel files. It runs in browsers and Node.js. Basic JSON to xlsx infers headers from object keys. Order follows insertion order — if you want explicit column ordering, pass a header array: --- Auto-Fit Column Widths By default, SheetJS sets no column widths — Excel shows all columns at the default…
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