Generate unique identifiers (v1 & v4) with customizable formatting options
Choose between UUID v4 (random) or v1 (time-based) format.
Set quantity (1-100), format (uppercase/lowercase), and hyphens.
Click generate and copy individual or all UUIDs to clipboard.
A UUID (Universally Unique Identifier), also known as a GUID (Globally Unique Identifier), is a 128-bit number used to uniquely identify information in computer systems. UUIDs are designed to be unique across space and time without requiring a central registration authority.
Use UUIDs as primary keys for distributed databases where auto-increment IDs aren't suitable.
Track API requests and responses with unique identifiers for logging and debugging.
Generate unique filenames for uploads to prevent conflicts and ensure uniqueness.
Create unique session tokens and identifiers for user authentication systems.
Identify messages in distributed systems and message queues uniquely.
Generate unique IDs for resources in microservices and distributed applications.
UUID v4 (Random): Generated using random numbers. Most commonly used version. Provides 122 bits of randomness with extremely low collision probability.
UUID v1 (Time-based): Generated using timestamp and machine identifier. Useful when you need sortable UUIDs or want to embed timestamp information.