how to change word file to pdf online code example

Example 1: phpword word to pdf

//DomPDF 
<?php
// Require composer autoloder.
require __DIR__.'/vendor/autoload.php';

use PhpOffice\PhpWord\IOFactory;
use PhpOffice\PhpWord\Settings;

// Make sure you have `dompdf/dompdf` in your composer dependencies.
Settings::setPdfRendererName(Settings::PDF_RENDERER_DOMPDF);
// Any writable directory here. It will be ignored.
Settings::setPdfRendererPath('.');

$phpWord = IOFactory::load('dok.docx', 'Word2007');
$phpWord->save('document.pdf', 'PDF');

Example 2: word to pdf

Just use Adobe Online converter it's free for one time and
for  more than 1 you may have to sign in, 
just use a temp mail like "moakt mail" or "temp mail" and u r good to go.
Link: https://www.adobe.com/in/acrobat/online/word-to-pdf.html
temp mail:https://temp-mail.org/