SynthForge IO

Generate PostgreSQL Test Data

Generate production-ready PostgreSQL datasets with \copy bulk loading, JSONB columns, and full foreign key integrity, ready to load in seconds.

\copy commandJSONB columnsFK integrityINTEGER PRIMARY KEYCSV exportBulk loading
Generate PostgreSQL Data

PostgreSQL SQL output preview

Here's what SynthForge IO generates for PostgreSQL, ready to run.

postgresql.sql 
CREATE TABLE customers (
    id         INTEGER PRIMARY KEY,
    name       VARCHAR(120) NOT NULL,
    email      VARCHAR(255) UNIQUE NOT NULL,
    metadata   JSONB DEFAULT '{}',
    created_at TIMESTAMP DEFAULT NOW()
);

CREATE TABLE orders (
    id          INTEGER PRIMARY KEY,
    customer_id INTEGER NOT NULL REFERENCES customers(id),
    total       NUMERIC(10,2) NOT NULL,
    status      VARCHAR(20) DEFAULT 'pending',
    placed_at   TIMESTAMP DEFAULT NOW()
);

-- Bulk load via \copy (fastest for PostgreSQL)
\copy customers (name, email, metadata)
FROM '/tmp/customers.csv' WITH (FORMAT csv, HEADER);

Built for PostgreSQL

Every export is optimized for PostgreSQL's specific syntax, types, and bulk loading commands.

\copy Bulk Loading

Generated exports include \copy commands, the fastest way to load large datasets into PostgreSQL via psql, bypassing row-by-row INSERT overhead.

JSONB Columns

JSONB columns get structured JSON objects with realistic nested keys and values, ready for PostgreSQL's powerful JSON operators and indexing.

Foreign Key Integrity

Every relationship is valid. Foreign key values are generated from referenced primary keys, with CREATE TABLE statements in correct dependency order.

Standard PostgreSQL DDL

Clean CREATE TABLE statements with VARCHAR, NUMERIC, TIMESTAMP, and INTEGER PRIMARY KEY. Standard types that work across all PostgreSQL versions.

Who uses PostgreSQL test data?

Analytics & BI Teams

Populate data warehouses with millions of realistic rows to test dashboards, reports, and aggregation queries before production data arrives.

DevOps & Docker Environments

Seed PostgreSQL containers in CI/CD pipelines with consistent test datasets. \copy commands load data faster than INSERT scripts.

Data Warehousing

Generate star-schema and snowflake datasets with foreign key integrity for testing ETL pipelines, materialized views, and partitioned tables.

JSONB & Bulk Loading

SynthForge IO leverages PostgreSQL's strengths: JSONB for flexible schema data and \copy for high-speed bulk imports.

JSONB Documents

Structured JSON objects for metadata, settings, and flexible schema columns, generated with realistic nested keys and values ready for GIN indexing.

\copy Performance

Bulk load via psql's \copy command, bypassing the SQL parser for dramatically faster imports, typically 5-10x faster than row-by-row INSERTs.

Referential Integrity

All foreign key relationships are fully valid. Tables are exported in dependency order so REFERENCES constraints resolve correctly on import.

CSV + SQL Exports

Get both CREATE TABLE DDL and CSV data files paired with \copy commands. Import the full dataset in a single psql session.

Also available for

MySQL

Test data generator

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SQL Server

Test data generator

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SQLite

Test data generator

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MongoDB

Test data generator

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View all export formats and features ->

Frequently asked questions

What PostgreSQL versions does SynthForge IO support?
SynthForge IO generates standard SQL compatible with PostgreSQL 12 and later. The DDL uses INTEGER PRIMARY KEY, VARCHAR, NUMERIC, TIMESTAMP, and JSONB. These types work across all modern PostgreSQL versions.
Can I generate \copy commands instead of INSERT statements?
Yes. When you export as PostgreSQL SQL, SynthForge IO generates \copy commands alongside CSV data files. \copy is the fastest way to bulk-load data into PostgreSQL via psql, typically 5-10x faster than row-by-row INSERTs for large datasets.
Does it handle PostgreSQL foreign key constraints?
Absolutely. SynthForge IO maintains full referential integrity across tables. Foreign key values are generated from the referenced table's primary keys, so every relationship is valid. The export includes CREATE TABLE statements with REFERENCES clauses in the correct dependency order.
Can I generate data for JSONB columns?
Yes. JSONB columns get structured JSON objects with realistic nested keys and value types. The generated data is ready for PostgreSQL's JSON operators, path queries, and GIN indexing.
How fast is PostgreSQL data generation?
SynthForge IO generates data at 60,000+ rows per second in your browser. A 100,000-row table with 10 columns typically completes in under 2 seconds. The generated \copy commands then load into PostgreSQL at near-disk speed.

Start Generating PostgreSQL Test Data

Design your schema, configure field types, and export production-ready PostgreSQL SQL in seconds.

Generate PostgreSQL Data