UUID Generator
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UUID Generator
Generate unique identifiers (UUIDs) for applications and databases
About UUID Generator
Generate unique identifiers (UUIDs) instantly for your applications and databases. Support for UUID v4 (random) and v1 (time-based) formats. Perfect for creating unique IDs for database records, API keys, and distributed systems.
Key Features
- Generate UUID v4 (random) and v1 (time-based)
- Generate single or multiple UUIDs at once
- One-click copy to clipboard
- Standard UUID format (8-4-4-4-12)
- Cryptographically secure random generation
- No data stored or logged
Use Cases
- Creating unique identifiers for database records
- Generating API keys and tokens
- Creating unique IDs for distributed systems
- Generating session identifiers
- Creating unique identifiers for file uploads
UUID Generator Use Cases
Discover practical applications for UUIDs in software development
Database Primary Keys
Use UUIDs as primary keys in databases to ensure uniqueness across distributed systems and avoid collisions when merging data from different sources.
API Authentication Tokens
Generate unique API tokens and authentication identifiers for secure API access. UUIDs provide excellent entropy for security-sensitive applications.
Distributed Systems
Create unique identifiers in microservices and distributed architectures where centralized ID generation is not feasible or desirable.
File Upload Identifiers
Generate unique file names and identifiers for uploaded files to prevent naming conflicts and ensure each file has a unique identifier.
Session Management
Create unique session IDs for user sessions in web applications. UUIDs provide better security than sequential IDs.
Event Tracking
Generate unique event IDs for analytics and tracking systems. UUIDs ensure each event can be uniquely identified across systems.
UUID Generator FAQs
Common questions about generating UUIDs
What is a UUID?
UUID stands for Universally Unique Identifier. It is a 128-bit identifier that is guaranteed to be unique across space and time, making it ideal for distributed systems and databases.
What is the difference between UUID v4 and v1?
UUID v4 uses random numbers and is the most commonly used version. UUID v1 is time-based and includes a timestamp, making it useful when you need to sort by creation time.
Are UUIDs truly unique?
While the probability of collision is extremely low (virtually zero for practical purposes), UUIDs are designed to be unique. UUID v4 has 122 random bits, providing 2^122 possible values.
What format are the UUIDs in?
UUIDs are generated in the standard format: 8-4-4-4-12 hexadecimal digits separated by hyphens (e.g., 550e8400-e29b-41d4-a716-446655440000).
Are the UUIDs stored or logged?
No, all UUID generation happens entirely in your browser. We do not store, log, or transmit any UUIDs. Your generated identifiers remain completely private.
Can I use UUIDs in production?
Yes, UUIDs are widely used in production systems. They are particularly useful for distributed systems, microservices, and scenarios where you need globally unique identifiers without a central authority.
How do I copy a UUID?
Click the copy button next to the UUID, or click the individual copy button for UUIDs in the list. The UUID will be copied to your clipboard and ready to paste.
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