Advance UUID generator

About Advance UUID generator

Generate UUID v4, UUID v7, and Nil UUIDs instantly with our free online UUID Generator. Create a single UUID or generate thousands in bulk, then copy or download the results in TXT, CSV, or JSON format. All processing happens directly in your browser, so your data never leaves your device.

What Is a UUID?

A UUID (Universally Unique Identifier) is a 128-bit identifier used to uniquely identify records, objects, sessions, transactions, and resources across applications and systems. UUIDs are commonly used in databases, APIs, distributed systems, and software development projects where unique identifiers are required. A typical UUID looks like this:
550e8400-e29b-41d4-a716-446655440000
Because UUIDs are designed to be globally unique, they can be generated independently without needing a central authority or database.

UUID Versions Supported

UUID v4 (Random)

UUID v4 is generated using cryptographically secure random numbers. It is the most widely used UUID version and is suitable for most applications. Common use cases:
  • Database primary keys
  • API resources
  • User identifiers
  • Session IDs
  • Application records

UUID v7 (Time-Ordered)

UUID v7 combines a timestamp with random data, making generated UUIDs sortable by creation time. Benefits of UUID v7:
  • Time-ordered identifiers
  • Better database indexing performance
  • Improved sorting capabilities
  • Modern alternative to UUID v1

Nil UUID

The Nil UUID contains only zeros:
00000000-0000-0000-0000-000000000000
It is commonly used as a placeholder value when no UUID has been assigned.

Features

  • Generate UUID v4, UUID v7, and Nil UUIDs
  • Bulk UUID generation
  • Generate up to thousands of UUIDs instantly
  • Copy results to clipboard
  • Download as TXT, CSV, or JSON
  • 100% browser-based processing
  • No registration required
  • Free to use

How to Use the UUID Generator

  1. Select the UUID version.
  2. Enter the number of UUIDs you want to generate.
  3. Choose your preferred output format.
  4. Click Generate UUIDs.
  5. Copy the results or download them as a file.

Frequently Asked Questions

Are the generated UUIDs unique?

UUID v4 and UUID v7 are designed to provide an extremely low probability of collision. For most practical applications, they can be considered unique.

Is this tool secure?

Yes. UUID generation uses the browser's Web Crypto API, which provides cryptographically secure random values.

Can I generate UUIDs in bulk?

Yes. You can generate multiple UUIDs at once and export them as TXT, CSV, or JSON files.

Does this tool send data to a server?

No. All UUID generation happens locally in your browser. No generated UUIDs are transmitted or stored.

Which UUID version should I use?

  • Use UUID v4 for most applications.
  • Use UUID v7 when time ordering and database performance are important.
  • Use Nil UUID as a placeholder or default value.

Free Online UUID Generator

Whether you're building APIs, developing software, designing databases, testing applications, or generating unique identifiers for projects, this UUID Generator provides a fast and reliable way to create UUID v4, UUID v7, and Nil UUIDs directly in your browser.