Free online database schema designer & ER diagram tool — no sign-up needed. Drag and drop tables, define relationships, and export to SQL, Prisma, GORM, Laravel, and more. Supports PostgreSQL, MySQL, SQLite & MSSQL natively. Start locally for free. Go Pro for cloud sync & version history. Unlike dbdiagram.io or DrawSQL — DesignSQL takes you from diagram to deployable code, faster.