ToolBox

UUID Generator

Generate universally unique identifiers (UUID v4) for use in databases, APIs, and application development. Create one or up to 100 UUIDs at once.

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How to Use

  • Set the number of UUIDs to generate (1 to 100).
  • Click Generate UUID to create the identifiers.
  • Copy all generated UUIDs to your clipboard with the copy button.

How It Works

A UUID (Universally Unique Identifier) is a 128-bit identifier that is unique across space and time. Version 4 UUIDs are generated using random numbers, making collisions extremely unlikely (approximately 1 in 5.3 x 1036).

UUIDs are commonly used as primary keys in databases, correlation IDs in distributed systems, and unique identifiers in APIs where sequential IDs might expose business logic.

Frequently Asked Questions

UUID v4 is a version of UUID that is generated using random or pseudo-random numbers. It follows the format xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx, where '4' indicates version 4 and 'y' is one of 8, 9, a, or b.
While theoretically possible, the probability of collision is astronomically low. You would need to generate about 2.71 quintillion UUIDs to have a 50% chance of a single collision.
UUIDs are ideal for distributed systems where multiple nodes generate IDs independently, when you want to hide record counts, or when merging data from different sources.

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