Generate cryptographically secure, random version 4 UUIDs instantly — one at a time or in bulk.
UUIDs are used throughout software development to uniquely identify records, sessions, and objects without needing a central database to assign IDs. This tool generates standard, RFC 4122-compliant version 4 UUIDs using your browser's cryptographically secure random number generator.
Everything happens locally in your browser — no UUIDs are logged or sent to a server.
A UUID (Universally Unique Identifier) is a 128-bit identifier, typically shown as 32 hexadecimal characters split into 5 groups, used to uniquely identify data without a central authority assigning them.
This tool generates version 4 (random) UUIDs, the most commonly used format, which relies on random numbers rather than timestamps or hardware addresses.
Yes, it uses your browser's built-in crypto.getRandomValues() function, a cryptographically secure random number generator, not a weak Math.random() implementation.
Yes, UUIDs generated here are standard RFC 4122 version 4 UUIDs and work as unique identifiers in any language or database, including Java, Python, and JavaScript applications.