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A UUID (Universally Unique Identifier) is a 128-bit value used to uniquely identify information in software systems. Our UUID Generator creates compliant UUIDs instantly — supporting v1 (time-based), v4 (random), and v5 (name-based) variants.
UUIDs are essential for database primary keys, session tokens, distributed systems, and anywhere you need guaranteed uniqueness without a central authority. Unlike sequential IDs, UUIDs can be generated independently across multiple servers without collision risk.
Generate single or bulk UUIDs with one click. Each UUID follows RFC 4122 standards and is formatted in the standard 8-4-4-4-12 hexadecimal pattern. All generation happens client-side for maximum speed and privacy.
UUID v1 is generated from the timestamp and MAC address, making it roughly time-ordered. UUID v4 is generated from random numbers, providing better privacy but no ordering guarantee.
The probability of collision is astronomically low. For UUID v4, you would need to generate about 2.71 quintillion UUIDs before having a 50% chance of a single collision.
You can generate any number of UUIDs in bulk. The tool generates them instantly in your browser.