365chess.com is a free, web-based chess game database and opening reference site. It provides a searchable collection of millions of games from professional and strong amateur play, with filters for player name, opening (ECO code), year, and result. Games can be viewed in a built-in board viewer with move navigation.

The opening explorer is one of the site's most used features: navigate from the starting position by clicking moves and see the statistical outcomes, most popular continuations, and notable games that have passed through each position. The explorer is backed by the full game collection, making it useful for quick opening research.

All content on 365chess.com is free to access without registration. It is a practical, no-frills database tool for players who need quick game lookup or opening statistics without the overhead of desktop database software.