So I\'ve got a HTML file, that I am using to send emails, but in some instances I want it simply to use that file to create a PDF of the same template.
I\'ve got i
You can use your existing HTML as a blob, and convert it to PDF like this:
var htmlBody = HtmlService.createHtmlOutputFromFile('my_file_within_script_project.html').getContent();
var blob = Utilities.newBlob(htmlBody, 'text/html').getAs('application/pdf').setName('my_output_in_drive.pdf');
DriveApp.createFile(blob);