Crossword Kingdom is an online destination for people who enjoy word puzzles and brain games. The site offers free daily crosswords alongside a range of other puzzle formats, including word searches and Griddlers in different sizes. Visitors can browse recently published puzzles, solve games online, and print magazines for a paper-based experience. A crossword dictionary provides tools for searching words, including options to search alphabetically and distinguish accents, while the discussion forum offers a place for advice, instructions, and conversation.

For members, the crossword club provides an ad-free experience and access to a stated collection of 5,000 crosswords and 1,500 sudoku puzzles, with ten new puzzles added each day. The site also features news and promotional content, and invites users to support its services. Its navigation is available in several languages, including English, Spanish, Czech, Slovak, Polish, and German. Crossword Kingdom is presented as a service of Subakoprint s.r.o., with contact, privacy, and terms information available on the website.