Arcana Tools - Simple Utilities for Everyday Tasks

Generate version 4 UUIDs (universally unique identifiers) with cryptographically secure randomness.

About UUID Generator

Features

Version 4 UUIDs: Generate RFC 4122 compliant UUID v4 identifiers.
Bulk Generation: Create up to 10,000 UUIDs at once.
Cryptographically Secure: Uses Web Crypto API for true randomness.
Individual Copy: Copy individual UUIDs with a single click.
Copy All: Copy all generated UUIDs at once, one per line.

Common Use Cases

Database Records: Unique primary keys for database entities.
API Requests: Request tracking and correlation IDs.
Session Tokens: Temporary identifiers for user sessions.
File Naming: Unique names for uploaded files and resources.
Distributed Systems: Coordinate across multiple services.

What is a UUID v4?

A UUID (Universally Unique Identifier) version 4 is a randomly generated 128-bit identifier that is practically guaranteed to be unique. UUID v4 uses random or pseudo-random numbers and is the most commonly used UUID version.

The standard format is: xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx

The 13th character is always 4 (indicates version 4)
The 17th character is one of 8, 9, a, or b (variant bits)
Remaining characters are randomly generated

How to Use the UUID Generator

Enter the number of UUIDs you want to generate (1-10,000).
Click the Generate UUIDs button.
View your generated UUIDs in the results panel.
Click the Copy All button to copy all UUIDs to your clipboard.
Or hover over any individual UUID and click the copy icon to copy just that one.

Privacy & Security

Our UUID generator runs entirely in your browser using the Web Cryptography API'scrypto.getRandomValues()method. No data is sent to any server, ensuring complete privacy. The generated UUIDs are produced using a cryptographically secure random number generator, making them suitable for security-sensitive applications.