Random UUID Generator

Select your UUID version

Online UUID Generator: Random Unique Identifiers

UUID (Universally Unique Identifier) is a 128-bit identifier that is used to uniquely identify information in computer systems.

  • How is UUID generated?

    All UUIDs are randomly generated but based on the same conditions. There are four versions to build a guild. Some use the MAC address of the computer. The last version uses a random number generator based on a pseudo algorithm.
  • What is UUID version 1?

    A Version 1 UUID is a universally unique identifier that is generated using a timestamp and the MAC address of the computer on which it was generated.
  • What is UUID version 4?

    A Version 4 UUID is a universally unique identifier that is generated using random numbers. The Version 4 UUIDs produced by this site were generated using a secure random number generator.
  • Which UUID version is better?

    UUID v1 is generated by using a combination the host computers MAC address and the current date and time. In addition to this, it also introduces another random component just to be sure of its uniqueness.

    The generation of a v4 UUID is much simpler to comprehend. The bits that comprise a UUID v4 are generated randomly and with no inherent logic. Because of this, there is no way to identify information about the source by looking at the UUID.

    If you don't know what to go with, go with v4. It's good enough, and the chances of collision are practically none.

    If you actually want your UUID to give some indication of the date and computer in which it was created, then UUID v1 may be for you (although it is).

  • How many unique identifiers can generate in a single round on Dotrand?

    You can generate up to 100,000 random identifiers at once, but you can retry for how many times you want.
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