A UUID (Universally Unique Identifier) is a 128-bit number used to uniquely identify information in computer systems. This tool generates UUID version 4 (random) identifiers using the cryptographically secure random number generator built into modern browsers. Perfect for database keys, session IDs, API tokens, or any scenario where you need a guaranteed unique identifier. You can generate up to 100 UUIDs at once, choose between different formatting options, and easily copy individual UUIDs or the entire batch to your clipboard.