What is UUID Generator?
UUID Generator creates universally unique identifiers (UUIDs) that are guaranteed to be unique across space and time. UUIDs are 128-bit values used as identifiers in databases, distributed systems, and APIs. This tool generates UUID v1 (timestamp-based), v4 (random), and NIL UUIDs.
Common Use Cases
Database Primary Keys
Generate unique identifiers for database records without central coordination.
API Tokens
Create unique tokens for API authentication and session management.
Distributed Systems
Generate IDs that are unique across multiple servers without synchronization.
File Naming
Create unique filenames to prevent collisions in storage systems.
How to Use This Tool
- Select the UUID version (v1, v4, or NIL)
- Choose the number of UUIDs to generate
- Click "Generate" to create new UUIDs
- Copy individual UUIDs or all at once
Frequently Asked Questions
What is the difference between UUID v1 and v4?
UUID v1 includes a timestamp and MAC address, making it sortable by time. UUID v4 is completely random, offering more privacy.
Are UUIDs truly unique?
While not mathematically impossible to duplicate, the probability of collision is astronomically low (1 in 5.3×10^36 for v4).
What is a GUID?
GUID (Globally Unique Identifier) is Microsoft's term for UUID. They are essentially the same thing.