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UUID generator

Generate random UUIDs (v4, universally unique identifiers) — one at a time or in bulk, with or without hyphens.

Never leaves your device No signup Free forever Not stored, not logged
Generated UUIDs regenerates automatically

Number of UUIDs

1

Format

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How it works

Three steps, no account

1

Set how many you need

Drag the slider up to 50 at once — useful for seeding test data or database fixtures.

2

Choose the format

Standard UUIDs include hyphens (8-4-4-4-12); some systems expect the 32 hex characters with no separators.

3

Copy the list

One UUID per line, ready to paste straight into code, a spreadsheet, or a database seed script.

FAQ

Common questions

What version of UUID does this generate?
Version 4 — randomly generated, not derived from your MAC address or the current time like versions 1 and 2. This is the most common choice for general-purpose unique identifiers.
Are these UUIDs actually unique?
Collisions are astronomically unlikely — a v4 UUID has 122 random bits, so you'd need to generate billions of them per second for centuries before a collision became statistically plausible.
Is anything sent to a server?
No. Every UUID is generated locally in your browser with plain JavaScript — nothing is transmitted, logged, or stored.
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UUID Generator

Our UUID Generator helps you create random UUIDs (Universally Unique Identifiers) for your applications and systems. Generate single or multiple UUIDs with customizable formatting options.

How to Use the UUID Generator

1. Configure Settings

  • Number of UUIDs: Choose how many to generate
  • Format Options: Choose to include/remove hyphens
  • Generate: Click button to create UUIDs

2. Get Results

  • View generated UUIDs
  • Copy to clipboard
  • Generate new ones as needed

3. Format Options

  • Standard UUID format (with hyphens)
  • Compact format (without hyphens)
  • Multiple UUIDs at once
  • Easy copy functionality

Key Features

Generation Options

  • Single or multiple UUIDs
  • RFC 4122 version 4 compliant
  • Customizable formatting
  • Bulk generation

Output Format

  • Standard format: xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx
  • Compact format: xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
  • One UUID per line
  • Easy to copy and paste

A standard UUID looks like this: 123e4567-e89b-12d3-a456-426614174000

It consists of 32 hexadecimal digits displayed in 5 groups separated by hyphens: 8-4-4-4-12

Use Cases

1. Software Development

  • Database primary keys
  • Unique identifiers
  • Session IDs
  • Transaction IDs

2. System Integration

  • Message queuing
  • Distributed systems
  • API development
  • Data synchronization

3. Testing and QA

  • Test data generation
  • Mock data creation
  • System testing
  • Performance testing

Technical Features

  • Random Generation: Cryptographically secure
  • Bulk Creation: Multiple UUIDs at once
  • Format Control: Flexible output options
  • Copy Protection: Secure clipboard handling

Why Use Our UUID Generator

1. Reliable Generation

  • Standards compliant
  • Truly random
  • Collision resistant
  • Verified unique

2. User-Friendly Design

  • Simple interface
  • Clear options
  • Instant results
  • Easy copying

3. Privacy Focused

  • No data storage
  • Client-side generation
  • No external dependencies
  • Offline capable

Understanding UUIDs

What is a UUID?

A UUID (Universally Unique Identifier) is a 128-bit number used to uniquely identify information in computer systems. Also known as GUID (Globally Unique Identifier).

UUID Structure

  1. Time-low: First 32 bits
  2. Time-mid: Next 16 bits
  3. Time-high-and-version: Next 16 bits
  4. Clock-seq-and-reserved: Next 16 bits
  5. Node: Last 48 bits

Best Practices

  1. Storage: Use appropriate data types
  2. Indexing: Consider database performance
  3. Validation: Verify format when needed
  4. Documentation: Track UUID usage

Remember: UUIDs are essential for creating unique identifiers in distributed systems. Use this tool to generate reliable UUIDs for your applications.

Version 4 UUID

This generator creates Version 4 UUIDs which are randomly generated. This version is ideal for most use cases where you need a unique identifier.