UUID v4 Generator
Generate random UUID v4 identifiers instantly. Free, fast, and works offline — RFC 4122 compliant.
Frequently Asked Questions
What is a UUID?
A UUID (Universally Unique Identifier) is a 128-bit identifier that is unique across space and time. UUID v4 is randomly generated.
Is UUID v4 truly unique?
The probability of generating two identical UUID v4 values is astronomically low — approximately 1 in 2^122.
Can I use UUIDs as database primary keys?
Yes, UUIDs are commonly used as primary keys in distributed systems where auto-incrementing IDs are not practical.