UUID Generator — Free Online

Why Use a UUID Generator?

UUIDs (Universally Unique Identifiers) are essential for developers, database administrators, and anyone who needs unique identifiers. Our generator creates version 4 UUIDs — random and collision-resistant.

• Instant generation — UUIDs appear immediately in your browser
• Cryptographically secure — Uses the browser's built-in crypto.randomUUID()
• No registration — Free to use, no account needed
• Bulk generation — Get multiple UUIDs in one click

How to Use the Generator

1. Select how many UUIDs you need (1, 5, 10, or 50)
2. Click Generate UUID
3. Your UUIDs appear — click Copy to Clipboard to copy them

Frequently Asked Questions

Is the UUID generator free?

Yes! Completely free with no registration required.

What is a UUID?

UUID stands for Universally Unique Identifier. It's a 128-bit number used to uniquely identify information. Version 4 UUIDs are randomly generated and the chance of collision is astronomically small.

What is UUID v4?

UUID version 4 is generated from random numbers. It's the most common UUID variant and offers excellent collision resistance — you'd need to generate 1 billion UUIDs per second for about 100 years to have a 50% chance of a single collision.

Where can I use UUIDs?

Database primary keys, API identifiers, session IDs, file names, transaction IDs, distributed systems — anywhere you need a globally unique identifier without a central authority.

How many UUIDs can I generate at once?

You can generate 1, 5, 10, or 50 UUIDs in a single click.

Is this UUID generator secure?

Yes! We use the browser's built-in crypto.randomUUID() API, which generates cryptographically secure random values.