Generate random, version 4 UUIDs instantly with our free browser-based tool. Perfect for developers, database administrators, and anyone needing unique identifiers.
Uses cryptographically secure random number generation
Generates UUIDs instantly in your browser
No data leaves your computer - fully client-side
A UUID (Universally Unique Identifier) is a 128-bit number used to uniquely identify information in computer systems. UUIDs are standardized by the Open Software Foundation (OSF) as part of the Distributed Computing Environment (DCE).
UUID version 4 is randomly generated. Unlike other UUID versions that use specific data (like MAC address or timestamp), v4 UUIDs are generated using random or pseudo-random numbers. This makes them ideal for situations where uniqueness is the primary requirement.
UUIDs are widely used in software development for:
While there's a mathematical possibility of duplicates, the probability is extremely low (about 1 in 2122). For practical purposes, UUID v4 can be considered unique.
Absolutely! All UUID generation happens locally in your browser. No data is sent to any server, ensuring complete privacy and security.
Yes! Use the count selector to generate up to 100 UUIDs at once. They'll be displayed in a clean, line-by-line format for easy copying.
There's no limit! Generate as many UUIDs as you need. For bulk generation, use the count selector to generate multiple UUIDs at once.