Free Online UUID/GUID Generator Tool

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What is UUID Generator?

UUID Generator creates Universally Unique Identifiers (UUIDs) - 128-bit numbers used to uniquely identify information in computer systems. UUIDs are essential for databases, distributed systems, and anywhere unique identification is needed without central coordination.

How to Use UUID Generator

Select UUID version (v4 for random, v1 for time-based)
Set the number of UUIDs to generate (1-50)
Choose format options (uppercase, hyphens)
Click Generate and copy individual UUIDs or all at once

UUID Generator Features

Generate UUID v4 (random) and v1 (time-based)
Batch generation up to 50 UUIDs
Customizable format (uppercase, with/without hyphens)
One-click copy for individual or all UUIDs
Download as text file

UUID Generator FAQ

What's the difference between UUID v1 and v4?: UUID v4 uses random numbers and is the most commonly used. UUID v1 includes a timestamp and machine identifier, useful when you need chronological ordering.
Are UUIDs truly unique?: UUID v4 has 122 random bits, giving 5.3 × 10^36 possible values. The probability of collision is astronomically low - you'd need to generate 1 billion UUIDs per second for 86 years to have a 50% chance of one collision.
Should I use hyphens in UUIDs?: Hyphens are the standard format (8-4-4-4-12) and improve readability. Remove them if you need compact storage or your system doesn't accept them.