ClickHouse Fiddle is a new open-source SQL playground created specifically for ClickHouse, allowing users to run SQL queries in an arbitrary version of ClickHouse and share results via unique links. It provides a fast and easily accessible way to execute SQL queries from a browser, helping in various cases such as checking bug reproducibility, testing new SQL constructs, sharing snippets with execution results, and more. The platform's design features a simple web application, HTTP API, Docker containers, load balancing, and priority given to runners with pulled images to optimize latency. It has limitations compared to existing platforms, but its unique approach provides isolation via ephemeral containers, reducing resources required for running the whole platform.