Numerous software applications allow users to download entire websites onto the computer allowing users to analyze it a later time, even if there will be no Internet connection.
This type of software tools are called offline browsers and they will index the downloaded pages thus supporting subsequent fast searches.
They are particularly useful when Internet connection is restricted and one needs to process data from a certain website.
Additionally, offline browsers will come in handy for automating maintenance tasks on a Web site, like verifying links and validating HTML code.