Test Data Generator

Generate realistic fake data for testing using Faker.js.

Why use realistic fake data in development

Using real user data in development environments creates privacy and security risks. Realistic fake data lets you test your UI with names, emails, and addresses that look genuine: without exposing real personal information. It is essential for UI development, database seeding, automated testing, and generating realistic-looking demos.

This tool uses Faker.js loaded entirely in your browser. No data is sent to any server. Choose from 16 field types, up to 100 records, multiple locales, and three output formats. Faker.js is the same library used by millions of developers in Node.js test suites.

Step-by-step guide

  1. 1
    Select fields
    Check the data fields you need: full name, email, phone, address, company, job title, username, password, date of birth, UUID, and more.
  2. 2
    Set the count and locale
    Choose how many records to generate (up to 100) and select a locale for localised names and addresses (English, German, French, Spanish, Japanese, Arabic).
  3. 3
    Choose output format
    Select Table for an interactive view, JSON for API-ready output, or CSV for spreadsheet import.
  4. 4
    Click Generate Data
    Faker.js generates realistic, locale-aware data in your browser. No data is sent to any server.
  5. 5
    Copy or download
    Click Copy to copy the data to your clipboard, or Download to save it as a .json or .csv file.

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Frequently Asked Questions

What is Faker.js?
Faker.js is an open-source JavaScript library that generates realistic fake data for many locales. It powers this tool to create names, emails, phone numbers, addresses, and other data that look realistic without exposing real personal information.
Is the generated data real?
No. All data is randomly generated by Faker.js and does not correspond to real people, addresses, or companies. It is safe to use in development databases, test suites, and mockups.
What locales are supported?
English, German (Deutsch), French (Francais), Spanish (Espanol), Japanese, and Arabic. Selecting a locale affects names, cities, street addresses, and phone number formats.
Can I use this data in a staging database?
Yes. The data is generated in-browser and never transmitted anywhere. It is appropriate for seeding development and staging databases with realistic-looking test records.
How do I use the CSV output in Excel?
Click Download when CSV format is selected. Open the downloaded .csv file in Excel or Google Sheets. The first row contains column headers matching the field labels you selected.
Can I generate related data across records?
Each record is generated independently. For relational test data (e.g. users and their orders sharing the same IDs), a scripting approach with Faker.js directly would be more appropriate.
What is the Avatar (SVG) field?
This field generates a data URI for a simple SVG avatar: a coloured circle with a random letter. It is useful for UI mockups that need placeholder profile pictures without requiring external image hosting.
Is there a limit to how many records I can generate?
The tool supports up to 100 records per generation. For larger datasets, run multiple generations or use Faker.js directly in a Node.js script.

AlteredIdea vs alternatives

vs server-side tools: Everything runs in your browser: your data never leaves your device.

vs command-line tools: No setup needed. Works instantly in any browser.

vs paid tools: Completely free, no account required.