Text Lens is a Mac app by Sindre Sorhus. It lets you select text that you otherwise cannot copy, such as text from PDFs, images, videos, and more.

Text Lens will also allow you to copy text from saved files on your Mac: You can import images, PDFs, or other files, and Text Lens will copy everything on the page.

You can use the built-in Cloud Clipboard feature in Windows or make use of a third-party freeware to copy clipboard text data from one computer to another.