About UUID Generator
UUID Generator allows you to instantly generate universally unique identifiers (UUIDs) compliant with RFC 4122. Ideal for database primary keys, session IDs, transaction logs, and test data seeding.
How to Use UUID Generator
- Select the UUID version (v4 for random, v1 for time-based).
- Choose the quantity of UUIDs to generate.
- Toggle format options like dashes or uppercase letters.
- Click "Generate" and copy the results.
Frequently Asked Questions
What is a UUID v4?
A UUID version 4 is a universally unique identifier generated using random numbers. It has a negligible probability of collision.
What is the difference between UUID v1 and v4?
UUID v1 is generated using the host network address (MAC) and a timestamp, while UUID v4 is entirely random.
How unique are UUIDs?
UUIDs are 128-bit values. The number of possible UUIDs is 2^128 (about 3.4 x 10^38), making the probability of duplication virtually zero.