UUID Generator – Generate Unique Identifiers Online | ToolTree
Generate high-entropy UUID v4 identifiers instantly for free. ToolTree provides a secure, client-side UUID generator for databases and mock data.
UUID Generator
Generate universally unique identifiers (UUID V4) instantly. Our generator produces high-entropy, collision-resistant IDs suitable for database primary keys, session IDs, and unique resource identifiers.
Generator Settings
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What is a UUID V4?
A Version 4 UUID is a universally unique identifier generated using random numbers. It contains 122 bits of entropy, meaning the probability of a collision is effectively zero. It is the industry standard for identifying information in distributed systems without a central coordinator.
When to Use UUIDs?
- Database Keys: Prevent enumeration attacks compared to sequential IDs.
- Distributed Systems: Generate unique IDs across multiple servers without synchronization.
- Testing: Create unique, high-entropy mock data for development.