UUID
Generator

Generate UUID v4 and v7 online. Bulk generation, formatting options, and validation.

Options

Version
Format

Validate

Output

No UUIDs generated yet.

Reference

Nil UUID

00000000-0000-0000-0000-000000000000

Max UUID

ffffffff-ffff-ffff-ffff-ffffffffffff

Learn more

What makes UUIDs unique, and how do hashing and JWTs handle identity?

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Frequently Asked Questions

A UUID (Universally Unique Identifier) is a 128-bit label used to uniquely identify information in computer systems. It is formatted as 32 hexadecimal digits separated by hyphens in the pattern 8-4-4-4-12.

UUID v1 is generated using the current timestamp and the device MAC address, making it time-based and potentially traceable. UUID v4 is generated from random or pseudo-random numbers and contains no identifying information.

UUID v4 values have an astronomically low probability of collision, making them functionally unique in practice. The total number of possible v4 UUIDs is approximately 5.3 times 10 to the power of 36.

UUID Generator - Generate UUID v4 & v7 Online | ToolsCanvas