Codeforces is an online platform and community centered on programming competitions and algorithmic problem-solving. It hosts regular contests for participants at different levels, including Div. 1, Div.

2, Div. 3, and educational rounds, with timed challenges, multiple problems, and opportunities to compete for ratings and rankings. The site also features a problemset for practice, a Gym for contests and training, groups, and an educational section.

Members can follow user ratings, contributors, recent activity, and contest discussions, while editorials and solution discussions help participants review problems and learn from different approaches. Codeforces supports contest organization through its platforms and related tools, including Polygon, and offers an API. Its community contributes problem ideas, tests contests, shares analyses, and discusses programming topics.

The website also provides a calendar and information about upcoming competitions, with streams and mock contests featured among its activities. Supported by Telegram as its title sponsor, Codeforces continues to maintain and develop its infrastructure and run programming rounds for an international community of competitive programmers