SynthForge SynthForge SynthForge IO

Realistic test data for your database
Free up to 20,000 rows per dataset.

Describe your database in plain English and get multi-table test data with the foreign keys intact. No credit card.

For engineers seeding local and staging databases, for QA and load testing, and for AI agents working over MCP.

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  1. Describe it

    customers, their orders, and the line items on each order

  2. Get a schema

    customers

    • customer_id PK
    • first_name
    • last_name
    • email

    orders

    • order_id PK
    • customer_id FK
    • order_date
    • status

    order_items

    • order_item_id PK
    • order_id FK
    • quantity
    • line_price

  3. Get rows, keys intact

    customers
    customer_idfirst_namelast_nameemail
    1 Judy Jefferson bradmendez@example.net
    2 Robert Masoner hartnatasha@example.org
    3 Joseph Iverson nancyvargas@example.com
    4 Jeffrey Edmonson thunter@example.com
    orders
    order_idcustomer_idorder_datestatus
    1 1 2024-09-18T04:03:14 delivered
    7 2 2024-10-01T07:17:34 returned
    8 2 2025-02-08T18:40:20 delivered
    9 2 2025-10-03T03:46:24 canceled
    11 3 2024-04-05T07:52:51 returned
    15 4 2025-04-19T20:14:24 returned
    order_items
    order_item_idorder_idquantityline_price
    1 1 1 71.97
    2 1 3 14.76
    3 1 4 306.04
    21 7 1 420.61
    22 7 5 659.5
    23 7 4 1958.32
Every highlighted row belongs to the same customer. These are rows from the free sample pack, generated by the product.

Foreign keys, not just foreign key columns

Pick a customer. Every order that belongs to them lights up, because the generator wrote those keys to point at rows that exist.

Customers
orders
order_idcustomer_idorder_datestatus
112024-09-18T04:03:14delivered
722024-10-01T07:17:34returned
822025-02-08T18:40:20delivered
922025-10-03T03:46:24canceled
1132024-04-05T07:52:51returned
1542025-04-19T20:14:24returned

Take the data with you

The rows above come from the free sample pack: customers, products, orders and order items as SQL and CSV. No account needed.

Load paths for PostgreSQL, MySQL, SQL Server, DuckDB and CockroachDB are in the docs.

Download sample pack

The editor

Tables, keys and relationship lines. Drag, connect, generate.

SynthForge IO visual schema editor showing tables connected by relationships SynthForge IO visual schema editor showing tables connected by relationships

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.

Learn more ->

Data generation and export

152 field types, 7 SQL dialects, JSON and JSONL output (MongoDB-ready), Parquet, and CSV.

Learn more ->

Use it from your AI agent

Hosted MCP. Point Claude, Cursor or any Streamable HTTP client at it and get a downloadable multi-table dataset from one prompt.

Learn more ->

Reproducible benchmarks. We run SynthForge against CTGAN on UCI Adult and Credit Card Default and publish the harness. Constraint conformance and privacy are where a schema-driven generator wins; the page shows where it loses too.

Read the benchmarks ->

See SynthForge IO in action

Recorded in February 2026, before the current design.

Start with the schema you already have in mind

Describe it, paste the DDL, or pick a template. The first 20,000 rows are free.

Start free