Generate version 1 (time-based) or version 4 (random) UUIDs instantly. Bulk generate up to 100 at once.
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Generated UUIDs
Frequently Asked Questions
What is a UUID?
UUID (Universally Unique Identifier) is a 128-bit label used to uniquely identify objects in computer systems. Format: xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx.
v1 vs v4 — which should I use?
v4 is random and recommended for most use cases (database IDs, session tokens). v1 is time-based and includes the machine's MAC address, which may raise privacy concerns.
Are these UUIDs truly unique?
v4 UUIDs have 122 bits of randomness. The probability of collision is astronomically low — you'd need to generate billions per second for thousands of years to get a duplicate.