SynthForge IO is a synthetic data generator designed to streamline the creation of realistic datasets for database testing and machine learning applications. It enables users to design data models either visually or through natural language descriptions, facilitating the generation of extensive datasets with maintained referential integrity. This tool supports a wide range of databases, including PostgreSQL, MySQL, SQL Server, SQLite, MariaDB, DuckDB, CockroachDB, and offers MongoDB-ready JSON output. With over 100 field types and compatibility across seven SQL dialects, SynthForge IO caters to diverse data generation needs. Additionally, it provides features for creating machine learning training datasets with control over statistical distributions, class balance, and data imperfections, accompanied by data quality reports and baseline model evaluations. By eliminating the need for real data, SynthForge IO addresses privacy concerns and compliance issues, allowing users to generate realistic synthetic datasets freely.