UUID Generator
Generate unique identifiers (UUID v4). Free online UUID/GUID generator.
UUID v4: Randomly generated unique identifiers with 122 bits of randomness. Collision probability is extremely low (1 in 2^122).
Frequently Asked Questions
What is a UUID?
UUID (Universally Unique Identifier) is a 128-bit number used to uniquely identify information in computer systems.
When should I use UUIDs?
UUIDs are perfect for database primary keys, session IDs, file names, and any scenario requiring unique identifiers.
Are UUIDs truly unique?
While not mathematically guaranteed, the probability of collision is so low that UUIDs are considered unique for practical purposes.
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