How to Convert File Size in Bytes to KB, MB, GB in Javascript.js

function formatFileSize(bytes,decimalPoint) {
   if(bytes == 0) return '0 Bytes';
   var k = 1000,
       dm = decimalPoint || 2,
       sizes = ['Bytes', 'KB', 'MB', 'GB', 'TB', 'PB', 'EB', 'ZB', 'YB'],
       i = Math.floor(Math.log(bytes) / Math.log(k));
   return parseFloat((bytes / Math.pow(k, i)).toFixed(dm)) + ' ' + sizes[i];
}

//You only need to use the formatFileSize() function in JavaScript to convert file size units.

formatBytes(2000);       // 2 KB
formatBytes(2234);       // 2.23 KB
formatBytes(2234, 3);    // 2.234 KB

Thanks for this snippet :)

shouldn't the var k be 1024?

You cannot pass 0 for decimalPoint, because 0 || 2 in JavaScript is 2. Instead you can declare decimalPoint with a default value:

function formatFileSize(bytes,decimalPoint = 2) {