UUID Generator

Unique identifiers are needed constantly — primary keys, request IDs for tracing, filenames that must not collide, idempotency tokens — and this produces them in batches of up to a hundred. Version 4 UUIDs are 122 bits drawn from the browser's cryptographic random number generator, which makes them the sensible default for almost everything. Version 1 is built from the current timestamp plus a random node component, so identifiers sort roughly in creation order, at the cost of revealing when each was made; reach for it only when that ordering genuinely matters to you. Because generation happens in the page and nothing is transmitted, the values are safe to use where secrecy matters, not merely as opaque keys. Collisions with version 4 are not a practical concern: the space is large enough that duplicate identifiers are not something applications need to design defences around.