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UUID Generator
Generate cryptographically secure UUIDs (v4) or time-based UUIDs (v1) in bulk.
c75828ca-4e1e-402c-9109-5e7166ee0b31
69794c5c-6498-4b85-becc-37100d674eeb
b42638f2-553a-4c3b-b8c2-0496c9f8cd90
1e895af1-df40-4f46-aee5-085d0941871f
aa24b08c-897c-4f63-96d4-73362c998226
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.