UUID Generator

Generate v1, v4, or v7 UUIDs, in bulk.

Why Use Our UUID Generator?

Multiple UUID Versions

Generate v4 (random), v7 (timestamp + random), or v1 (timestamp) UUIDs based on your needs.

Bulk Generation

Create up to 1000 UUIDs at once for database seeding, testing, or batch operations.

RFC 4122 Compliant

All generated UUIDs follow the RFC 4122 specification for universal compatibility.

One-Click Copy

Copy all generated UUIDs to your clipboard instantly with a single click.

How to Generate UUIDs

  1. 1

    Select UUID Version

    Choose v4 (random - recommended for most uses), v7 (timestamp + random - sortable), or v1 (timestamp-based).

  2. 2

    Set Quantity

    Enter how many UUIDs you need (1-1000). Leave at 1 for single generation, or enter a larger number for bulk creation.

  3. 3

    Generate

    Click the "Generate" button. Your UUIDs appear instantly in the output field below.

  4. 4

    Copy to Clipboard

    Click the copy button to copy all generated UUIDs. They're ready to paste into your code, database, or config files.

UUID Versions Explained

UUID v4

Random (Recommended)

Generated using cryptographically secure random numbers. Most commonly used version. No information about time or device is encoded.

Best for: General purpose identifiers, user IDs, session tokens, API keys.

550e8400-e29b-41d4-a716-446655440000

UUID v7

Timestamp + Random

Combines Unix timestamp with random data. UUIDs are sortable by creation time while maintaining uniqueness. Newer standard gaining popularity.

Best for: Database primary keys (sortable), event IDs, time-series data, ordered records.

018f6b2a-7b3c-7def-8123-456789abcdef

UUID v1

Timestamp-based

Uses current timestamp and MAC address. Can expose device information and creation time. Less recommended for privacy-sensitive applications.

Best for: Legacy systems, when you need to extract creation time from the UUID.

6ba7b810-9dad-11d1-80b4-00c04fd430c8

Common Use Cases

Database Primary Keys

Use UUIDs as primary keys for distributed databases where auto-increment isn't practical.

API Resource IDs

Identify resources in REST APIs without exposing sequential information.

Session Tokens

Generate unique session identifiers for user authentication systems.

File Naming

Create unique filenames for uploads to prevent collisions and overwriting.

Distributed Systems

Generate IDs across multiple servers without coordination or collision risk.

Testing & Development

Quickly generate test data and mock IDs for development environments.

UUID Format & Structure

A UUID is a 128-bit number represented as 32 hexadecimal digits, displayed in five groups separated by hyphens in the form 8-4-4-4-12.

xxxxxxxx-xxxx-Mxxx-Nxxx-xxxxxxxxxxxx
  • M indicates the UUID version (1, 4, or 7)
  • N indicates the variant (typically 8, 9, a, or b for RFC 4122)
  • Total: 36 characters including hyphens, 32 hexadecimal digits
  • Possible combinations: 2122 (approximately 5.3 × 1036)

Frequently Asked Questions

What is a UUID?▼

A UUID (Universally Unique Identifier) is a 128-bit identifier that is unique across space and time. UUIDs are used to identify information in computer systems without requiring a central authority. The standard format is xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx (8-4-4-4-12 hexadecimal characters).

What is the difference between UUID v1, v4, and v7?▼

UUID v1 uses timestamp and MAC address (can expose device info). UUID v4 is purely random and most commonly used. UUID v7 combines timestamp with random data, making it sortable by creation time while maintaining uniqueness - ideal for database primary keys.

Which UUID version should I use?▼

For most cases, use UUID v4 - it's random, secure, and widely supported. If you need sortable IDs (e.g., for database primary keys that should be ordered by creation time), use UUID v7. Avoid v1 unless you specifically need timestamp-based IDs, as it can expose your MAC address.

Are the generated UUIDs truly unique?▼

Yes. The probability of generating duplicate UUIDs is astronomically low - you'd need to generate 1 billion UUIDs per second for 85 years to have a 50% chance of a single collision. For practical purposes, UUIDs are unique.

Can I generate UUIDs in bulk?▼

Yes! Our generator supports bulk generation of up to 1000 UUIDs at once. Simply enter your desired quantity in the quantity field and click Generate. All UUIDs can be copied to clipboard with one click.

What is the difference between UUID and GUID?▼

UUID (Universally Unique Identifier) and GUID (Globally Unique Identifier) are essentially the same thing. GUID is Microsoft's term for UUID. Both follow the same format and can be used interchangeably.