What is a Version 4 UUID?

A Version 4 UUID is a 128-bit universally unique identifier constructed from 122 cryptographically secure pseudo-random bits, defined by RFC 4122.

What are the chances of two UUID v4 collisions?

The probability of generating a duplicate UUID v4 is approximately 1 in 2.71 quintillion ($2.71 \times 10^{18}$), making collisions practically impossible in real-world distributed architectures.

Are UUIDs and GUIDs the same thing?

Yes. GUID (Globally Unique Identifier) is Microsoft's implementation of the standard UUID (Universally Unique Identifier). They follow the identical 36-character hexadecimal format.

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Generate RFC 4122 compliant Version-4 Universally Unique Identifiers (UUIDs) and Microsoft GUIDs in bulk. Customize hyphens, uppercase formatting, and braces.

Primary Generated UUID v4

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Bulk Generated Output 10 UUIDs

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