UUID Generator
Generate random UUID v4 values. Choose how many and click Generate.
What is UUID Generator?
UUID Generator is a powerful tool that creates Universally Unique Identifiers (UUIDs) following the RFC 4122 standard. UUIDs are 128-bit identifiers that are guaranteed to be unique across time and space, making them ideal for database primary keys, API endpoints, and distributed systems.
Our generator creates version 4 (random) UUIDs using cryptographically secure random number generation. These identifiers are represented as 36-character strings in the format xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx, where each 'x' is a hexadecimal digit.
UUIDs are essential in modern software development for creating unique identifiers without requiring coordination between different systems or databases. They're widely used in web applications, microservices, and distributed architectures.
What Problems Does It Solve?
Unique ID Generation
Creates globally unique identifiers without requiring coordination between different systems or databases, eliminating ID conflicts.
Database Design
Provides primary keys for databases that are guaranteed to be unique across distributed systems and microservices.
API Development
Enables creation of unique resource identifiers for REST APIs and web services without exposing internal database IDs.
Security Enhancement
Provides unpredictable identifiers that are difficult to guess, improving security in applications and preventing enumeration attacks.
How to Use UUID Generator
Set Count
Choose how many UUIDs you want to generate (1-1000). Use the number input to specify the exact quantity needed for your project.
Generate UUIDs
Click the "Generate" button to create your UUIDs. Each UUID is cryptographically secure and guaranteed to be unique.
Copy & Use
Copy the generated UUIDs from the output area and use them in your applications, databases, or API endpoints as needed.
UUID Best Practices:
- • Use UUIDs for primary keys in distributed systems where auto-incrementing IDs aren't suitable
- • Store UUIDs as binary (16 bytes) in databases for better performance than string storage
- • Use UUIDs for API resource identifiers to avoid exposing internal database structure
- • Consider using UUIDs for session tokens, file names, and temporary identifiers
- • UUIDs are case-insensitive but typically displayed in lowercase with hyphens
- • Version 4 UUIDs are recommended for most applications due to their randomness and security
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