UUID Generator

UUID (Universally Unique Identifier) is a standardized identifier format that ensures uniqueness across distributed systems. This tool helps you quickly generate standard-compliant UUIDs.

What is UUID?

UUID is a 128-bit number typically represented as 32 hexadecimal digits divided into 5 groups separated by hyphens. For example: 123e4567-e89b-12d3-a456-426614174000

Key characteristics:

Globally unique
No central registration required
Generated locally
Fixed length
Case insensitive

Features

Support for multiple UUID versions
- Version 4 (Random UUID)
- Version 1 (Time-based UUID)
Optional formatting options
Batch generation capability
One-click copy
Case conversion

How to Use

Select UUID version
Set desired format options
Click "Generate" button to create new UUID
Use copy button to get the generated UUID

Use Cases

Databases

Primary key generation
Relationship table references
Partition keys

Distributed Systems

Transaction identifiers
Session IDs
Resource locators

File Systems

File naming
Directory organization
Temporary file identification

Application Development

User ID generation
Device identification
Request tracking

Best Practices

Choose Appropriate Version
- Use Version 1 when time ordering is needed
- Use Version 4 for pure randomness
- Consider specific application requirements
Storage Considerations
- Use appropriate data type (e.g., CHAR(36))
- Consider indexing needs
- Evaluate storage space requirements
Performance Optimization
- Use batch generation for efficiency
- Implement caching strategically
- Monitor generation frequency

Technical Specifications

Compliant with RFC 4122 standard
128-bit identifier
Multiple representation formats supported
Global uniqueness guaranteed

Important Notes

UUIDs are long and may impact database performance
No guarantee of sequential order or readability
Consider encoding when used in URLs
Use when appropriate for the use case