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UUID Generator
Generate cryptographically secure UUIDs (v4) or time-based UUIDs (v1) in bulk.
5f783dda-bf81-4198-94bd-80cbd41234bd
ac40a130-4bb6-487b-8fac-ebe63ec1bfa7
a29e38b9-2a79-4a21-8089-3d1ef8f36e6d
260de132-ce43-44be-8143-5605dfffb624
5508dd8c-ffd8-4721-a5fd-4fb7bdaa8c6c
xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx
Random bits
Version = 4
Variant bits
More random
About This Tool
UUID Generator creates version 4 UUIDs (Universally Unique Identifiers) using cryptographically secure randomness. UUIDs are 128-bit identifiers formatted as eight groups of hexadecimal characters separated by hyphens.
Version 4 UUIDs (RFC 4122) are randomly generated except for 6 bits indicating the version and variant. The probability of generating two identical UUIDs is astronomically low - effectively zero for any practical use.
Common uses include database primary keys, session tokens, file naming, API request IDs, and distributed system coordination. Generation uses crypto.randomUUID() or crypto.getRandomValues(). No server call needed.