Question 1

What is a UUID and why should I use one?

Accepted Answer

A UUID (Universally Unique Identifier) is a 128-bit number used to uniquely identify information in computer systems. UUIDs are practically guaranteed to be unique across all systems and time, making them perfect for database primary keys, API tokens, and distributed system identifiers.

Question 2

What's the difference between UUID and GUID?

Accepted Answer

UUID and GUID (Globally Unique Identifier) are essentially the same thing - both are 128-bit unique identifiers. GUID is Microsoft's term for UUID, but they follow the same standards and format. Our generator creates standard UUID v4 identifiers that work everywhere.

Question 3

Are the generated UUIDs truly unique?

Accepted Answer

Our UUID generator creates version 4 UUIDs using cryptographically strong random number generation. While theoretically possible, the chance of generating duplicate UUIDs is so astronomically small (1 in 2^122) that it's considered practically impossible in real-world scenarios.

Question 4

Which UUID format should I use?

Accepted Answer

The standard lowercase format (e.g., 'f47ac10b-58cc-4372-a567-0e02b2c3d479') is most commonly used and widely supported. Use uppercase for systems that require it, brackets for Microsoft environments, URN format for web standards, or no-dashes for compact storage.

Question 5

Can I generate UUIDs in bulk?

Accepted Answer

Yes! You can generate up to 100 UUIDs at once using our bulk generation feature. This is useful for database seeding, testing, or when you need multiple unique identifiers for your application.

Question 6

Is it safe to use these UUIDs in production?

Accepted Answer

Absolutely! Our UUID generation happens entirely in your browser using secure random number generation. No data is sent to our servers, and the generated UUIDs meet the UUID v4 standard requirements for production use in applications, databases, and distributed systems.

Online UUID Generator

Generated UUID

UUID Information

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Frequently Asked Questions

What is a UUID and why should I use one?

What's the difference between UUID and GUID?

Are the generated UUIDs truly unique?

Which UUID format should I use?

Can I generate UUIDs in bulk?

Is it safe to use these UUIDs in production?

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