How to use
Click "Generate UUID" to create a single UUID v4. Click any UUID in the list to copy it to your clipboard. Use "Generate 10 UUIDs" for a batch.
FAQ
What is a UUID?
A Universally Unique Identifier (UUID) is a 128-bit label used to identify resources. The standard format is 8-4-4-4-12 hexadecimal digits separated by hyphens.
What are UUID versions?
UUID v1 is time-based, v3 and v5 are name-based (using MD5/SHA-1), and v4 is randomly generated. v4 is the most commonly used for its simplicity and good uniqueness guarantees.
Are UUIDs truly unique?
UUIDs are not guaranteed to be unique, but the probability of a collision is astronomically small — roughly 1 in 5.3×10^36 for v4. In practice, they are treated as unique.