x-spreadsheet

The sheet_to_json utility function generates output arrays suitable for use with other JS libraries such as data grids for previewing data. With a familiar UI, x-spreadsheet is an excellent choice for developers looking for a modern editor.

The new docs include more detail and examples.

The original demo is available at https://docs.sheetjs.com/xspreadsheet/

A hosted version of the xlsxspread.js script is available on the SheetJS CDN:

https://cdn.sheetjs.com/xspreadsheet/xlsxspread.js original script
https://cdn.sheetjs.com/xspreadsheet/xlsxspread.min.js minified