Realistic test data for your database
in seconds, not afternoons.
Generate a million rows across Postgres, MySQL, SQL Server, SQLite, MariaDB, DuckDB, and CockroachDB with foreign keys intact, plus MongoDB-ready JSON output. Design your schema visually or describe it in plain English. Free, with generous defaults: up to 1,000,000 rows per dataset, 200 MB per download, 5 GB stored per account.
See SynthForge IO in action
In addition to relational & JSON data
ML Training Datasets
SynthForge IO also generates supervised learning datasets with full control over features, statistical distributions, class balance, stratified train/test splits, and data imperfections. Includes data quality reports and baseline model evaluation. No licensing issues, no vendor negotiations.
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Explore what SynthForge IO can do
Schema Design
AI-powered generation, visual drag-and-drop editor, SQL/JSON import, and built-in templates. One universal format for SQL and NoSQL.
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Data Generation & Export
152 field types, 7 SQL dialects, JSON / JSONL output (MongoDB-ready), Parquet with multiple compression options, and CSV.
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Free to Use
No sign-up fees, no credit card, no trial timer. Generous defaults; limits exist only because we are being frugal with hosting costs.
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Start Designing Your Data Model
Design once, generate realistic datasets with referential integrity.