The dark web can be accessed through the Tor Browser, which can be downloaded for free from https://www.torproject.org/. After downloading and installing the Tor Browser, you can access the dark web by entering the URL of a dark web site, such as a search engine like DuckDuckGo or a marketplace like AlphaBay. It is important to note that accessing the dark web can be risky, so please exercise caution when exploring and navigating it.