A UUID (Universally Unique Identifier) is a 128-bit identifier standardized by RFC 4122. UUID v4 is randomly generated and offers virtually zero chance of collision — making it ideal for distributed systems and database primary keys.

What is the difference between UUID and GUID?

UUID and GUID (Globally Unique Identifier) are functionally identical. UUID is the standardized term defined by RFC 4122, while GUID is Microsoft's implementation of the UUID standard. They can be used interchangeably.

Are UUID v4 truly random?

UUID v4 uses cryptographically strong random number generators when available. In modern browsers and Node.js, Crypto.getRandomValues() ensures high-quality randomness, making UUID v4 suitable for security-sensitive applications.

ToolboxPrivacy-First

Developer

UUID Generator

Generate random UUID v4 strings. Create multiple UUIDs in bulk with one click.

Quick Answer & Summary

The UUID Generator is a fast, accurate Developer utility designed to generate random uuid v4 strings. create multiple uuids in bulk with one click. entirely in your browser with zero server data storage.

Generate UUIDs

Number of UUIDs to generate (1-100)

Share This Tool

Help your team and fellow developers save time with free, private client-side utilities.

X (Twitter)LinkedIn WhatsApp Reddit Facebook

Toolbox Editorial TeamVerified Authors

Systems & Security Engineers • Applied Cryptography & High-Performance Web Tools

Updated: August 2026

100% In-BrowserZero server storage

Standards AuditedRFC & ISO compliant

Peer ReviewedEditorial Policy

Documentation & Guide

How to Use UUID Generator

Set quantity

Choose how many UUIDs you want to generate (1-100).

Generate

Click the Generate button to create your UUIDs.

Copy

Click Copy on individual UUIDs or Copy All to copy all at once.

Pro Tips

UUID v4 is randomly generated

Practically zero chance of collision

Practical Examples & Conversions

Input

Count: 1

Output

550e8400-e29b-41d4-a716-446655440000

Frequently Asked Questions (PAA)

Related Tools & Converters

Random Generator

Generate random values

Password Generator

Generate passwords

Hash Generator

Generate hashes

Authoritative Standards & Citations

Calculations and algorithms on this page are implemented and verified in strict accordance with the following official technical specifications:

IETF (Internet Engineering Task Force)

RFC 7519: JSON Web Token (JWT)

Standardized compact, URL-safe means of representing claims to be transferred between two parties.

W3C Recommendation

Web Cryptography API Specification

Standard JavaScript API for performing basic cryptographic operations in web applications.

IETF Standards Track

RFC 4122: A Universally Unique IDentifier (UUID) URN Namespace

Definition of uniform format and generation algorithms for UUIDs.