UUID Generator
Generate secure random UUID v4 identifiers instantly.
Generated UUIDs will appear here.
What is a UUID used for?
UUIDs are commonly used as database primary keys, request IDs, session identifiers, and object identifiers in distributed systems — anywhere you need a unique value without a central counter or coordination between services.
Why UUID v4?
UUID v4 is generated from random (or pseudo-random) bits, making it simple to generate anywhere without needing timestamps or network identifiers. The collision probability is astronomically low for practical purposes.
Frequently asked questions
What is a UUID?+
A UUID (Universally Unique Identifier) is a 128-bit identifier, typically written as 32 hex digits in groups separated by hyphens, used to uniquely identify records without central coordination.
What UUID version does this tool generate?+
This tool generates UUID version 4, which is based on random numbers rather than timestamps or hardware addresses.
How random are the generated UUIDs?+
The tool uses the browser's crypto.randomUUID() API where available, which relies on a cryptographically secure random number generator.
Can I generate multiple UUIDs at once?+
Yes. Choose a quantity from 1 to 100 and click Generate to produce that many UUIDs, which you can then copy all or download as a text file.