On clicking the Save button, Microsoft Edge will download the PDF, and you can then open it later from File Explorer using your favorite PDF reader. Go down the page following the file extensions ...

Select "Download" to save the resulting PDF(s) to your PC. Then, click "Delete Files" to remove your PDF from the site’s ...

If you only have a few PDFs to merge and you don’t want to install an app, utilize one of the many web-based PDF mergers.