Tool Capabilities

The UUID Generator creates universally unique identifiers following the RFC4122 standard. UUIDs are 128-bit identifiers that are guaranteed to be unique across space and time, making them ideal for distributed systems where unique identification is critical.

• Generate UUIDs in multiple versions (v1, v4, v5, v6, v7)
• Create namespace-based UUIDs with custom inputs
• Format UUIDs with or without hyphens
• Convert UUIDs to uppercase or lowercase
• Generate multiple UUIDs at once
• Validate existing UUIDs

Common Use Cases

1. Database Primary Keys

   UUIDs are commonly used as primary keys in databases, especially in distributed systems where multiple servers might be generating IDs simultaneously.

2. Distributed Systems

   In microservices architectures, UUIDs help track requests and entities across multiple services without coordination.

3. Content Addressing

   UUIDs can be used to uniquely identify content or resources in content management systems and file storage.

4. Session Identifiers

   Web applications use UUIDs to create unique session IDs that are extremely unlikely to collide.

5. Device Identification

   Hardware devices can be assigned UUIDs during manufacturing to ensure each device has a globally unique identifier.

6. Temporary File Names

   When creating temporary files, UUIDs ensure no filename collisions occur even in high-concurrency environments.

7. URL-Safe Identifiers

   UUIDs can be used in URLs to identify resources without revealing sequential information or patterns.

Technical Details

This tool implements all standard UUID versions defined in RFC9562:

• Version 1 (Timestamp): Uses the current timestamp and MAC address to generate a UUID. Provides chronological ordering but may expose system information.
• Version 4 (Random): Uses random numbers to generate a UUID. Most commonly used version due to its simplicity and privacy.
• Version 5 (Namespace): Generates a UUID based on a namespace and name using SHA-1 hashing. Useful for creating consistent UUIDs from the same input.
• Version 6 (Reordered Timestamp): Similar to v1 but with improved timestamp ordering.
• Version 7 (Unix Epoch Time): Uses Unix timestamp for better time-based sorting.

The tool also supports special UUIDs:

• NIL UUID: All zeros (00000000-0000-0000-0000-000000000000)
• MAX UUID: All ones (ffffffff-ffff-ffff-ffff-ffffffffffff)

The implementation uses the official uuid npm package, which provides high-quality, standards-compliant UUID generation.