🎉 Launch Offer: Sign up before Jan 31st & get Lifetime Pro Access - Unlimited rows, forever!

Generate Millions of Rows of Mock Data in Seconds

Stop writing INSERT scripts manually. MockBlast generates production-ready seed data, test data, and dummy data for PostgreSQL, MySQL, MongoDB, SQLite, JSON, and CSV. Get 10,000 rows for free—10x more than Mockaroo. Import your SQL schema or build visually, then download instantly. Perfect for database seeding, performance testing, and UI development.

Unlimited rows forever (Launch offer)

SQL, JSON, CSV, MongoDB support

No credit card required

Why use an Online Mock Data Generator?

Stop writing Python scripts with Faker or manually inserting rows into your database. MockBlast is the fastest way to generate seed data for PostgreSQL, MySQL, SQLite, and MongoDB databases with realistic test data. Whether you need to generate fake data, dummy data, or test data for development, MockBlast creates production-ready data instantly.

Whether you are testing pagination performance, building a demo for a client, seeding a database for QA testing, or just need to fill up a UI with sample data, MockBlast allows you to define your database schema and download millions of rows in seconds. Perfect for developers who need to generate large datasets without writing custom scripts.

Generate PostgreSQL seed data, MySQL test data, MongoDB sample data, or CSV files with realistic values. Import your existing SQL schema or build it visually—MockBlast handles foreign keys, enums, UUIDs, ObjectIds, and all common data types automatically.

Supported Data Types & Field Types

• UUIDs & GUIDs (PostgreSQL, MySQL)
• ObjectId (MongoDB documents)
• Full Names & Usernames
• Email Addresses (Valid formats)
• Phone Numbers
• Password Hashes (Bcrypt for testing)
• API Keys & Tokens (Configurable length)
• Real Addresses (Street, City, Country)
• Dates & Timestamps (ISO format)
• Integers & Floats (Numbers, Money)
• Booleans (True/False)
• Long Text & Paragraphs
• Company Names
• Website URLs
• Avatar Image URLs
• Custom Lists (Enums & Foreign Keys)

Export Formats & Database Support

• SQL INSERT Statements (PostgreSQL, MySQL, SQLite)
• MongoDB JavaScript Scripts (ObjectId support)
• JSON (Nested objects, arrays support)
• CSV (Excel compatible, comma-separated)

Key Features

• SQL Schema Import (Paste CREATE TABLE)
• Multi-Table Generation (Relational databases)
• Foreign Key Support (Custom lists)
• Live Preview (See data before download)
• Streaming Downloads (No browser freeze)
• Privacy First (No data storage)

Common Use Cases

Database Seeding

Generate seed data for PostgreSQL, MySQL, or MongoDB databases. Perfect for populating development databases, creating test fixtures, or preparing demo environments with realistic sample data.

Performance Testing

Create large datasets (up to 1 million rows) to test pagination, query performance, indexing strategies, and database scalability without manually writing thousands of INSERT statements.

UI Development

Fill your frontend applications with realistic data. Generate user profiles, product catalogs, blog posts, or any structured data to make your UI look production-ready during development.

API Testing

Generate JSON test data for API endpoints. Create realistic request payloads, test data validation, and simulate various data scenarios without manual data entry.

Cloud Powered Streaming

We handle the compute. Generate 1M+ rows without freezing your browser. Data streams directly to your download.

Privacy First

We do not store your generated data or schemas. Everything is streamed directly to you and discarded immediately.

Relational Integrity

Smart foreign key generation via custom lists ensures your data makes sense across tables. Perfect for multi-table databases.

SQL Schema Import

Paste your CREATE TABLE statements and we parse everything automatically. Supports PostgreSQL, MySQL, SQLite, and MongoDB.

Stop renting your mock data.

The old ways are slow, expensive, or leak your schema. MockBlast is the local-first successor to Mockaroo and Python scripts.

Legacy SaaS Generators

Like Mockaroo™ or Generatedata

• Expensive monthly subscriptions ($500+/yr)
• Slow UI, outdated 2010 design
• Cloud-storage risks for your schema

MODERN CHOICE

MockBlast

The Developer’s Choice

• One-time payment (Lifetime License) - No subscriptions
• Smart SQL Import - Paste CREATE TABLE statements
• Zero-Trust: Data stays private, never stored
• Foreign Key support via Custom Lists (Enums & FKs)
• Multi-table generation for relational databases
• MongoDB support with ObjectId generation

DIY Scripts

Python Faker, Node.js scripts

• Hours spent writing/debugging scripts
• SQL syntax errors on insertion
• Hard to share with non-technical team

Built for Developers, by Developers

SQL Syntax Native

Most generators fail at escaping single quotes (O'Reilly vs O''Reilly). MockBlast understands PostgreSQL, MySQL, and SQLite syntax natively, so your INSERT statements run on the first try.

Privacy First

Unlike Mockaroo or ChatGPT, we don’t train AI models on your schema. Your table structure is parsed locally in your browser (or ephemeral server memory) and discarded instantly.

Simple, One-Time Pricing.

Stop paying monthly subscriptions for fake data.

• 10,000 rows per generation (10x more than Mockaroo)
• SQL, JSON, CSV & MongoDB formats
• Multi-table support via SQL import
• All data types & custom lists
• Unlimited rows (1M+)

Most Popular

• Unlimited rows & tables
• Priority Support
• Commercial Use

Frequently Asked Questions

Is this a subscription?No. You pay once, you own it forever. We hate subscriptions for simple tools too.

How do I generate fake data for PostgreSQL?MockBlast supports PostgreSQL natively. Simply paste your CREATE TABLE statement or use the visual builder to define your schema. Then download production-ready SQL INSERT statements that work perfectly with PostgreSQL.

Can I generate test data for MongoDB?Yes! MockBlast fully supports MongoDB. You can generate MongoDB seed data in JavaScript format, including ObjectId generation for MongoDB documents. Just select ‘MongoDB (JS Script)’ as your output format.

How do I create seed data for MySQL?MockBlast generates MySQL-compatible SQL INSERT statements. Import your MySQL CREATE TABLE schema or build it visually, then download ready-to-use seed data that works with MySQL databases.

What’s the difference between MockBlast and Mockaroo?MockBlast offers 10,000 free rows (10x more than Mockaroo’s 1,000), supports MongoDB, has multi-table generation, and uses a one-time payment model instead of expensive monthly subscriptions. Plus, your data stays private—we don’t store your schemas.

How do I generate foreign key relationships?Use Custom Lists to define foreign key values. For example, if you have a user_id foreign key, create a custom list with user IDs from your users table. MockBlast will randomly select from these values to maintain referential integrity.

Can I generate password hashes?Yes! MockBlast generates valid bcrypt password hashes for the plaintext password ‘password’. This means you can log into any generated user account using the password ‘password’ for testing purposes.

Does my data go to your server?We generate data on our server and stream it directly to you. Once you receive it, you are the only one who has it. We don’t store your generated data or use it for training AI models.

Do you save our schemas?It’s your preference whether you want to save your schemas or not. You can choose to save them for quick access later, or keep them private. We never use your schema data for any purpose other than generating your requested data.

Can I use this for client work?Yes, the license covers commercial usage. You can use the generated data for any number of client projects, commercial applications, or internal tools.

What databases are supported?MockBlast supports PostgreSQL, MySQL, SQLite, MongoDB, and generic JSON/CSV output. You can generate seed data, test data, or dummy data for any of these databases with proper syntax and formatting.

How do I generate millions of rows?Free users can generate up to 10,000 rows per file. Pro users can generate up to 1,000,000 rows per file. All data is streamed directly to your browser, so you can download large files without memory issues.

Can I import my existing SQL schema?Yes! MockBlast can parse CREATE TABLE statements from PostgreSQL, MySQL, and SQLite. Just paste your SQL schema and we’ll automatically extract column names, data types, and constraints to generate matching test data.

What data types can I generate?MockBlast supports UUIDs, ObjectIds, names, emails, phone numbers, addresses, dates, timestamps, booleans, numbers, floats, passwords (bcrypt), API keys, avatars, URLs, company names, long text, and custom lists for enums or foreign keys.