🆔UUID Generator

Generate universally unique identifiers (UUID v4) instantly.

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About UUID Generator

UUID Generator instantly produces one or more UUID v4 (randomly generated universally unique identifiers) using cryptographically secure randomness. Copy single UUIDs or batch-generate dozens at once for database primary keys, session tokens, entity IDs, and any other use case requiring guaranteed uniqueness.

How to Use UUID Generator

1
Choose how many UUIDs to generate
Enter the number of UUIDs you need — from 1 to hundreds — in the quantity field.
2
Generate the UUIDs
Click 'Generate' to produce cryptographically random UUID v4s.
3
Copy and use
Click 'Copy All' to copy all generated UUIDs to your clipboard, or click the copy icon next to any individual UUID.

Common Use Cases

Generating primary keys for database records in SQL or NoSQL databases
Creating unique identifiers for distributed system entities without central coordination
Producing session tokens and correlation IDs for request tracing
Generating unique IDs for test fixtures in automated testing

Frequently Asked Questions

What is a UUID v4?

UUID v4 is a 128-bit identifier generated using random or pseudo-random numbers, formatted as 32 hexadecimal characters separated by hyphens (e.g., 550e8400-e29b-41d4-a716-446655440000). It is statistically guaranteed to be unique across all systems.

Can two generated UUIDs ever be the same?

The probability of generating a duplicate UUID v4 is astronomically small — approximately 1 in 2^122. In practice, UUID collisions are so rare they can be safely ignored for virtually all applications.

What is the difference between UUID and GUID?

GUID (Globally Unique Identifier) is Microsoft's term for the same concept as UUID. They are interchangeable — GUIDs follow the same UUID standard and format.