UUID Generator – Timestamp based, MD5 Namespace, Random, SHA-1 Namespace

What is a UUID?

A UUID (Universally Unique Identifier) is a 128-bit number used to identify information in computer systems. UUIDs are designed to be unique across space and time, making them ideal for distributed systems, databases, and API development where unique identifiers are crucial.

UUID Versions Explained

• v1 (Timestamp): Generated using timestamp and MAC address. Useful when you need time-based sorting.
• v3 (MD5): Generated using MD5 hash of a namespace and name. Deterministic and reproducible.
• v4 (Random): Completely random generation. Most commonly used and recommended for general purposes.
• v5 (SHA-1): Similar to v3 but uses SHA-1 hash. More secure than v3 for namespace-based UUIDs.

Common Use Cases

• Database primary keys and record identifiers
• API request tracking and correlation IDs
• Session identifiers for web applications
• File naming and versioning systems
• Distributed systems where centralized ID generation is impractical

Privacy & Security

All UUID generation happens locally in your browser using the standard UUID library. No data is sent to any server or stored anywhere. Your generated UUIDs are completely private and created entirely client-side for maximum security.