PDF Shaper Free is an excellent piece of software out there to help you merge or combine PDF files on Windows 10 and earlier Windows versions. Likewise, not all users can afford commercial PDF editing tools. While online free services are better and easy-to-use, not all users are comfortable uploading their confidential documents to an unknown server.
You know that there are plenty of free online services as well as commercial programs around to help you merge PDF files. However, there is no way out there to merge or combine PDF files out of the box. You can convert any document or image file to PDF using the built-in Microsoft Print to PDF feature. Windows 10 supports viewing PDF files and creating PDF files out of the box.