Free UUID/GUID Generator | Create Unique IDs Instantly

Need a unique identifier for a database record, API transaction, or any other application? Our free UUID/GUID Generator provides cryptographically-strong, Version 4 UUIDs with a single click. Get a universally unique ID instantly and copy it to your clipboard without any hassle.

Online UUID and GUID Generator Tool UUID / GUID Generator Version 4 Unique Identifiers Generate UUID f47ac10b-58cc-4372-a567-0e02b2c3d479

UUID/GUID Generator

Click "Generate New UUID" to create one.

How to Use the UUID Generator

Using our tool is as simple as it gets:

  1. Click the Generate New UUID button to create a new, unique identifier.
  2. Click the Copy to Clipboard button to instantly copy the generated UUID.

Example of a Generated UUID

Each click will produce a unique, 36-character string in the standard 8-4-4-4-12 format. Here is an example:

d1b3b3e0-3b3a-4e1a-8b0a-3b3a3b3a3b3a

What is a UUID / GUID?

A UUID (Universally Unique Identifier) is a 128-bit number used to identify information in computer systems. The term GUID (Globally Unique Identifier) is also used, typically by Microsoft, but they refer to the same standard. The purpose of a UUID is to be unique across all systems and at all times. The chance of two generated UUIDs ever being the same is astronomically low, making them ideal for distributed systems without a central coordinating entity.

This tool generates Version 4 (V4) UUIDs, which are created using random or pseudo-random numbers. This is the most common type of UUID used today.

Common uses for UUIDs include:

  • Database Primary Keys: Unlike auto-incrementing integers, UUIDs can be generated anywhere without risk of collision, which is perfect for distributed databases.
  • Transaction IDs: Uniquely identifying every transaction in a financial or logging system.
  • API Request Tracking: Assigning a unique ID to each API request to trace its path through various microservices.
  • User Session Identifiers: Creating unique, hard-to-guess IDs for user sessions.

Frequently Asked Questions (FAQ)

Q1: How "unique" are these UUIDs really?

For all practical purposes, they are unique. A Version 4 UUID has 122 bits of randomness, leading to 2¹²² (or 5.3 undecillion) possible combinations. The probability of generating a duplicate is so infinitesimally small that it is considered negligible for nearly every application.

Q2: What version of UUID does this tool generate?

This tool generates Version 4 (V4) UUIDs. It uses the `crypto.randomUUID()` method available in modern web browsers, which is specifically designed to create cryptographically-strong, randomly generated UUIDs compliant with the RFC 4122 standard.

Q3: Is it safe to use the UUIDs generated here?

Yes. The entire generation process is performed locally in your browser (client-side). No information is sent to our servers. The `crypto` API used is a secure, industry-standard method for generating random data, making the UUIDs suitable for production use.