Will I ever get a duplicate UUID?

The probability of a collision with UUID v4 is astronomically small. You would need to generate about 2.71 quintillion UUIDs to have a 50% chance of a single collision.

Can I generate UUIDs without dashes?

Yes. The tool offers a no-dash format option that removes the hyphens, producing a 32-character hexadecimal string like 550e8400e29b41d4a716446655440000.

UUID Generator in Your Browser

Generate UUID v4 identifiers without CLI tools or libraries. This browser-based generator uses the Web Crypto API for cryptographic randomness, producing IDs that are safe for database keys, session tokens and distributed systems.

Open UUID Generator

How to Generate UUIDs

Click Generate to create a new random UUID
Adjust the batch size to generate multiple UUIDs at once
Toggle between uppercase and lowercase formatting
Copy individual UUIDs or the entire batch to your clipboard

Common Use Cases

Generating test data for database seeding scripts
Creating idempotency keys for payment API calls
Assigning unique IDs to messages in event-driven architectures

Frequently Asked Questions

Will I ever get a duplicate UUID?: The probability of a collision with UUID v4 is astronomically small. You would need to generate about 2.71 quintillion UUIDs to have a 50% chance of a single collision.
Can I generate UUIDs without dashes?: Yes. The tool offers a no-dash format option that removes the hyphens, producing a 32-character hexadecimal string like 550e8400e29b41d4a716446655440000.