UUID Generator

Generate cryptographically random UUID v4 identifiers — free, no signup. Generated locally in your browser using the Web Crypto API. Never transmitted anywhere.

UUID v4 (Universally Unique Identifier) uses 122 bits of cryptographic randomness. The probability of generating two identical UUIDs is astronomically small — roughly 1 in 5.3 × 1036. Used as primary keys in databases, session tokens, and distributed systems.

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