Crossword-Solver.ai is an online crossword resource for puzzle fans, offering tools to find answers and create original puzzles. Its free solver lets users search by clue, answer, or letter pattern, with an optional answer-length filter to narrow results. Search results draw on thousands of published puzzles and are ranked by confidence based on how often answers match similar clues. The site features clues and puzzles from publications including Universal, Eugene Sheffer, Thomas Joseph, Premier Sunday, LA Times Daily, and USA Today crosswords.

Beyond solving, users can build a crossword by entering their own clues and answers; the generator creates a grid that can be shared through a unique link or downloaded as a PDF. The site also offers puzzle browsing and a step-by-step solving guide covering clue patterns, crossing letters, and strategies for working through a grid. An account option supports puzzle creation, while listed tracking features include plays, completion rates, and solve times.