UUID Generator

What is a UUID?

UUID stands for Universally Unique Identifier. It is a 128-bit number used to identify information in computer systems. A typical UUID looks like this: 550e8400-e29b-41d4-a716-446655440000

UUIDs are designed to be unique across all systems and all time without needing a central authority to hand them out. That makes them very useful in distributed systems, databases, and APIs where you need to generate IDs without coordinating between multiple services.

What is UUID Version 4?

Version 4 UUIDs are randomly generated. The only structure is a version indicator in the 13th character and a variant indicator in the 17th character. Everything else is random. This makes v4 the most commonly used UUID version for general purpose ID generation.

How to Use This Tool

1. Click Generate UUID to create a single UUID.
2. Click Copy to copy it to your clipboard instantly.
3. For bulk generation enter a number and click Generate.
4. Use the Uppercase or No hyphens options to change the format.
5. Click Copy All to copy the entire list.

When Should You Use UUIDs?

Use UUIDs as primary keys in databases when you want IDs that are unique without relying on auto-increment. Use them in APIs to identify resources. Use them in file names when you need guaranteed uniqueness. Use them in distributed systems where multiple services need to create IDs independently without collisions.

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Frequently Asked Questions