Random UUID Generator
Generate random UUID v4 (Universally Unique Identifier) values for use in databases, APIs, software development, and anywhere a unique ID is needed.
What Does This Tool Do?
A UUID is a 128-bit number formatted as a string of hexadecimal characters separated by hyphens, like 550e8400-e29b-41d4-a716-446655440000. UUIDs are designed to be globally unique — the chances of two randomly generated UUIDs being identical are astronomically small. They're widely used as primary keys in databases and as identifiers in APIs.
Key Features
How to Use This Tool
- Click Generate to create one or more random UUIDs.
- Copy the UUID(s) you need.
- Use them as unique identifiers in your database, API, or application.
How It Works
A UUID v4 is generated by creating 122 bits of random data and setting specific bits to indicate the version (4) and variant. The random data is formatted as 32 hexadecimal characters split into five groups separated by hyphens.
Common Use Cases
Frequently Asked Questions
Are generated UUIDs truly unique?
The probability of a collision between two randomly generated UUIDs is approximately 1 in 5.3×10^36 — effectively zero for any practical purpose.
What version of UUID does this generate?
Version 4 UUIDs, which are generated using random data as specified by RFC 4122.
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