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Mock Data Generator

Generate up to 10,000 rows of high-quality mock data securely in your browser for testing DBs and APIs.

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Free Mock Data Generator for Database Testing & API Prototyping

Need high-quality mock data for your application? Our Mock Data Generator is a fast, secure, and free tool designed to help developers, software testers, and data analysts generate completely realistic dataset profiles instantly. Whether you need dummy data for database testing, fake data for REST API mocking, or test data for UI prototyping, this tool provides a comprehensive mockaroo alternative that runs entirely in your browser.

Why Do Developers Need Dummy Data Generators?

Building modern applications requires realistic test data at every stage of the development cycle. Using production data for testing poses serious privacy and compliance risks, while manually creating test records is painfully slow. A mock data generator solves both problems by producing realistic, schema-aware data on demand.

  • Database Load Testing: Populate your PostgreSQL, MySQL, or MongoDB tables with thousands of realistic rows to benchmark query performance, test indexing strategies, and validate schema constraints under realistic data volumes.
  • UI/UX Prototyping: Fill dashboards, tables, and card layouts with lifelike names, emails, addresses, and dates so your design reviews focus on the visual experience rather than empty placeholder text.
  • API Development (Mocking): Generate JSON or CSV payloads that mirror your production API structure, allowing frontend teams to build and test integrations before the backend is fully ready.

A Free & Secure Alternative to Mockaroo

Unlike cloud-based generators that require accounts and impose row limits, our tool runs 100% client-side. Your schema configuration and generated data never leave your browser, making it ideal for teams working under strict data privacy policies or corporate firewalls.

Export Formats Supported

  • JSON (JavaScript Object Notation): The default format for REST APIs and NoSQL databases. Each row becomes a JSON object in an array, ready to import directly into MongoDB or use as API response fixtures.
  • CSV (Comma-Separated Values): Universal spreadsheet format compatible with Excel, Google Sheets, and any relational database import wizard. Ideal for data analysts and QA teams.
  • SQL Insert Statements: Get ready-to-execute INSERT queries for MySQL, PostgreSQL, or SQLite. Simply copy the output, paste it into your database client, and your test tables are populated instantly.

Frequently Asked Questions

Is my mock data generated securely?
Absolutely. All data generation logic executes entirely within your web browser using client-side JavaScript. No data is sent to our servers, and nothing is logged or stored. Your schema and output remain completely private.
How many records can I generate at once?
You can generate up to 10,000 rows in a single batch. The generator is optimized for speed, so even large datasets are produced in just a few seconds directly in your browser.
Do I need to create an account?
No. Our mock data generator is completely free to use with no registration, login, or subscription required. Just configure your schema and start generating data instantly.