Our Random Data Generator is a simple but powerful tool for anyone who needs to create realistic sample data fast. Whether you're building a new database, filling out website mockups, or testing your application's logic, you can define custom columns and generate thousands of rows of data instantly. Best of all, everything happens right in your browser, so your data schemas and generated results stay completely private.

Key Features & Benefits

Realistic Data Types

Generate authentic-looking user information including names, emails, and street addresses that feel like real data.

Custom Patterns

Use our pattern tool to create unique IDs, serial numbers, or any other specific format your project requires.

Flexible Exporting

Easily download your results as a clean CSV for spreadsheets, a JSON file for your app, or SQL statements for your database.

Privacy Guaranteed

Because all data is generated locally in your browser, your schemas and results are never sent to any server or recorded anywhere.

How to Use the Random Data Generator - Create Realistic Test Data Online

Define Your Columns

Start by adding the columns you need. Choose from 12 different data types like names, emails, addresses, and random numbers.

Set Your Rules

Customize each column by setting specific rules, like minimum and maximum values for numbers or unique patterns for IDs.

Choose Your Format

Decide how many rows you need (up to 10,000) and pick the format that works for you, such as CSV, JSON, or SQL.

Generate and Download

Click generate to see your data instantly. You can then preview the results, copy them to your clipboard, or download the full file.

Practical Use Cases

App Development

Quickly populate a new application with realistic user data to see how it looks and behaves before using real information.

Database Testing

Create thousands of rows of data to see how your database handles large amounts of information and test your queries.

Form Validation

Generate random dates, phone numbers, and emails to make sure your website's form validation works exactly as expected.

UI Mockups

Fill out your design mockups and dashboards with realistic data to give your clients a better feel for the final product.

FAQs

What types of data can I generate?

The data generator supports 12 different field types including strings, numbers, booleans, dates, emails, phone numbers, person names, addresses, UUIDs, URLs, enums (custom lists), and custom patterns.

How do I create a custom data schema?

Click the Add Field button to create a new field in your schema. For each field, specify a name and select a field type. You can also use the Sample Schema button to load a pre-configured example schema.

What output formats are supported?

The data generator supports three output formats: CSV (Comma-Separated Values) for spreadsheets, JSON for web applications, and SQL INSERT statements for databases.

How many rows of data can I generate?

You can generate between 1 and 10,000 rows of data per generation. Simply enter your desired row count in the Number of Rows field.

Is my generated data secure and private?

All data generation is performed entirely in your browser using JavaScript. No data is uploaded to our servers or transmitted anywhere. The generated data remains completely private and secure on your device.