Random UUID Generator

UUID v1 includes timestamp and node information, making them time-ordered but potentially revealing system info. UUID v4 is completely random and most commonly used. UUID v7 is a newer standard that combines Unix timestamps with random data, providing time ordering without revealing system information.

Yes, UUIDs are designed to be unique across space and time. The probability of generating duplicate UUIDs is so low it's considered negligible in practical applications. Our generator uses cryptographically secure random generation for maximum entropy.

UUID v4 is recommended for most general purposes as it's completely random and widely supported. Use v1 if you need time-ordered identifiers but don't mind revealing timestamp and system info. Use v7 for modern applications requiring time-ordered IDs without system information leakage.

Standard format uses lowercase with hyphens (550e8400-e29b-41d4-a716-446655440000). Uppercase converts all letters to capitals. No-hyphens removes dashes for compact storage. Braced wraps in curly brackets {uuid}. URN format creates a full URN identifier (urn:uuid:...).

Yes, these UUIDs are generated using cryptographically secure methods and are suitable for production use. They follow RFC standards and provide the same uniqueness guarantees as other UUID generators.

v1 UUIDs use a timestamp since October 15, 1582, combined with a clock sequence and node identifier. v7 UUIDs use Unix timestamps (since January 1, 1970) combined with random data, providing better entropy while maintaining time ordering.