Generate lists of cryptographically secure Universally Unique Identifiers (UUIDv4) conforming strictly to RFC 4122 standards. Choose batch volume counts, customize string capitalization, and export clean lists for databases, APIs, and systems with zero collision risk.
A UUID v4 (Universally Unique Identifier) is a 128-bit identifier represented as a 36-character hexadecimal string divided into 5 groups (8-4-4-4-12) separated by hyphens. Unlike other versions, version 4 relies entirely on pseudo-random numbers, producing 122 bits of cryptographic randomness and 6 bits of version/variant metadata.
The collision probability of UUIDv4 is practically zero. With 2^122 possible combinations, you would need to generate 1 billion UUIDs per second for about 85 years to have a 50% chance of encountering a single duplicate. It is highly secure for distributed database primary keys.
Yes, 100% locally and securely. Our generator leverages the browser's standard cryptographic engine `window.crypto.getRandomValues()` API to secure high-quality randomness (entropy), ensuring that generated tokens are unpredictable and safe for security uses.