UUID / GUID Generator

Universally unique identifiers are the standard way to give objects a collision-resistant identity without a central service. A version 4 UUID is a 128-bit value with 122 bits of random data — enough randomness that the probability of two generated values colliding anywhere in the world is negligible for practical purposes. They appear everywhere: database primary keys, cache keys, transaction IDs, session tokens and client-generated IDs that the server later adopts.

A UUID generator batch-creates one, ten or a thousand identifiers in a single click, using the browser's cryptographically secure random generator rather than a predictable pseudo-random seed. Each UUID follows the RFC 4122 formatting — 8-4-4-4-12, lowercase hexadecimal with hyphens — which is what the vast majority of APIs, ORMs and databases expect.

Because generation happens locally, you can mint identifiers for architecture diagrams, seed scripts and documentation without an online dependency, and you control exactly how many you produce. Copy the whole batch to the clipboard with one tap and paste it straight into seed scripts or mock data generators.