Usage no npm install needed!

<script type="module">
  import xlsxCoordinates from 'https://cdn.skypack.dev/xlsx-coordinates';
</script>

README

node-xlsx-coordinates

Parse Excel coordinates:

col2num('A') // -> 0
col2num('Z') // -> 25
col2num('AA') // -> 26

num2col(26)   // -> 'AA'
num2col(25)   // -> 'Z'

parseCell('A4') // -> [0, 3, 'A4']
parseCell('B5') // -> [1, 4, 'B5']

stringifyCell([1,4]) // -> 'B5'

Also included is a function to convert an Excel sheet into a simple 2 dimensional array:

tabulate( xlsx_sheet )

Example usage:

var xlsx = require('xlsx');
var workbook = xlsx.readFile(process.argv[2]);
var sheetName = workbook.SheetNames[0];
var sheet = workbook.Sheets[sheetName];
tabulate(sheet).forEach(function(row){console.log(JSON.stringify(row));});