UUID Generator
Generate cryptographically secure UUID version 4 identifiers for databases, distributed systems, and unique identifiers. Single or bulk generation available. For downstream data pipelines, you can stream bulk UUID exports straight into DataKit to format records instantly.
Single UUID
Bulk UUID Generation
About UUIDs
UUID Version 4 uses cryptographically secure random values. Format: xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx
Common Use Cases:
- •Database Primary Keys: Unique identifiers for records
- •Distributed Systems: Globally unique IDs without coordination
- •File Names: Unique file identifiers to prevent collisions
- •Session IDs: User session tracking in web applications
What is a UUID?
A UUID (Universally Unique Identifier) is a 128-bit identifier that's designed to be unique across both space and time. UUID version 4 uses random or pseudo-random numbers to ensure uniqueness.
UUID Format
UUIDs follow the format: xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx
- • Total length: 36 characters (32 hexadecimal digits + 4 hyphens)
- • Version 4 indicator: The digit "4" in the third group
- • Variant bits: The first character of the fourth group is limited to 8, 9, A, or B
- • Probability of collision: Extremely low (~1 in 2^122)
Why Use UUIDs?
No Central Coordination
Generate unique IDs without database lookups or network calls
Globally Unique
Guaranteed uniqueness across distributed systems
Non-Sequential
Prevents enumeration attacks and maintains privacy
Standardized
Defined by RFC 4122, widely supported across platforms
Common Use Cases
- •Database Primary Keys: Use as primary keys in NoSQL databases or as alternate keys in SQL databases
- •Distributed Systems: Generate unique identifiers across multiple servers without coordination
- •File and Object Storage: Unique file names to prevent naming collisions
- •Session Management: Track user sessions securely and uniquely
- •Message Queues: Unique identifiers for messages and transactions