RelateDB is an offline-first, browser-based database schema designer that enables visual modeling of tables and relationships. It allows users to import SQL or DBML, auto-arrange diagrams, and export SQL/DBML or images. Operating entirely locally in the browser with no accounts, cloud dependency, or limits, it offers fast, frictionless schema design. This tool solves the need for accessible, self-contained database modeling by combining visual design capabilities with offline functionality, making it ideal for developers seeking a convenient, unrestricted way to create and manage database schemas without external dependencies.