Bulk UUID Generator
Generate multiple unique identifiers (UUIDs) in various formats
Generator
Development
150
About UUIDs
Version 4 (Random)
Generated using random or pseudo-random numbers. Most commonly used and provides good uniqueness guarantees.
Version 1 (Timestamp)
Based on timestamp and MAC address. Provides temporal ordering but may reveal information about when and where it was generated.
Use Cases
- Database primary keys
- API request identifiers
- Session tokens
- File and resource naming
- Distributed system coordination
Frequently Asked Questions (FAQ)
Are UUIDs guaranteed to be unique?
UUIDs are designed to be globally unique, and the probability of collision is extremely low, but not mathematically impossible.
Can a UUID have capital letters?
UUIDs are hexadecimal and can be represented in uppercase or lowercase. By convention, they are usually shown in lowercase.
Should I use UUID as a primary key?
UUIDs can be used as primary keys, especially in distributed systems, but may have performance implications compared to sequential integers.
What is UUID number in BIOS?
The BIOS UUID is a unique identifier assigned to a computer’s hardware, often used for asset tracking and system management.
Which version of UUID should I use?
Version 4 (random) is most common for general use. Version 1 (timestamp) is used when temporal ordering is needed. Temporal ordering is useful for log entries or event tracking.
Will we run out of UUIDs?
It is extremely unlikely. There are 2^128 possible UUIDs, making exhaustion practically impossible.