ToolzYard

Fast, practical, browser-based developer tools

UUID Tool • Free Online • No Signup

UUID Generator Online

Generate one or multiple UUID v4 values instantly in your browser. This UUID generator is useful for databases, APIs, testing, fixtures, seed data, distributed systems, and development workflows where unique identifiers are needed.

Last updated: March 2026
Ready to generate UUIDs.
Fast • Free • Browser-Based

Generate UUID v4 values instantly for apps, APIs, and data workflows

UUIDs are useful when you need unique identifiers without depending on an auto-incrementing database value. This tool helps you create one or many UUID v4 values quickly for development, testing, and data generation.

✅ UUID v4 generation
✅ Single or multiple IDs
✅ Copy instantly
✅ Download list

Useful for testing and integration work

This UUID generator works directly in the browser, so you can quickly create identifiers for local development, mock payloads, fixtures, sample data, and integration testing.

For more details about site usage and analytics, read our Privacy Policy.

How to use this UUID Generator

Choose how many UUIDs you want to create, generate the result, then copy or download the list for use in your project or workflow.

  1. Enter how many UUIDs you want to generate.
  2. Click Generate.
  3. Review the generated UUID list in the output area.
  4. Copy or download the result as needed.

Example output

550e8400-e29b-41d4-a716-446655440000
9f6b2b4a-98b3-4d52-8f8e-73e4a63f8f7a
e19f0b29-2b10-4fc0-98d1-b0f3e860d2db

Common use cases

  • Database record IDs
  • API test payloads
  • Mock fixtures
  • Distributed systems
  • Seed and import data

What is a UUID?

A UUID is a universally unique identifier. UUID v4 is randomly generated and commonly used in APIs, systems integration, distributed applications, and database records where uniqueness matters.

UUIDs are useful when you need identifiers that can be generated independently across different systems without relying on a shared sequence.

Why use a UUID generator?

A UUID generator helps create unique values quickly for development and production workflows. It is useful when building apps, testing payloads, generating records, or preparing data imports.

  • Uniqueness: helpful for independent ID generation.
  • Scalability: no central incrementing counter is required.
  • Testing: great for fixtures, mocks, and seed data.
  • Convenience: generate one or many IDs instantly in the browser.

Frequently Asked Questions

What UUID version does this generate?

This page generates UUID version 4 values.

Can I generate multiple UUIDs?

Yes. Enter a count and generate many UUIDs at once.

Does it work in the browser?

Yes. The generator works directly in the browser.

Can I copy and download the output?

Yes. You can copy the generated UUID list or download it as a text file.

Is this UUID generator free?

Yes. This tool is free to use online and works directly in the browser.