SynthForge IO

SynthForge is a free web app for generating realistic synthetic and test data across related database tables in a single pass, every foreign key points at a parent row that actually exists.

Design a schema once from plain English (AI), a visual editor, pasted SQL DDL, CSV assist, or templates. Then generate rows for every table together: 152 field types across 19 categories, statistical distributions, conditional column values, per-relationship cardinality, and dialect-aware exports (PostgreSQL, MySQL, SQLite, SQL Server, MariaDB, DuckDB, CockroachDB) plus JSON, JSONL, and Parquet. Large flat exports can stream out-of-core on the server. ML training-dataset templates are included for common use cases.

Automate from scripts or CI with personal API keys (Bearer auth) and a public OpenAPI at api.synthforge.io. Agent-friendly discovery via llms.txt and agent.json.

Free to use with no credit card and no trial timer, an account is required to generate. SynthForge is greenfield generation from a schema: it does not de-identify production databases or provide differential privacy.