UUID Generator
Try the free UUID Generator tool in the Generator category provided by WebToolBox right in your browser. Process your tasks quickly and securely without any installation.
Output
What is UUID (v4) Generator?
A UUID (Universally Unique Identifier, RFC 4122) is a 128-bit label formatted as 32 hexadecimal characters across five hyphenated groups (8-4-4-4-12, e.g. `123e4567-e89b-12d3-a456-426614174000`).
UUID Version 4 relies on cryptographically secure pseudorandom numbers, making the probability of generating a duplicate so microscopically small that it is considered practically impossible globally without central coordination.
Crucial for database primary keys, distributed system transaction tracing, and secure session identifiers.
How to Use
- Select the number of UUIDs you wish to generate (bulk creation supported).
- Click 'Generate UUID' to create cryptographically secure identifiers.
- Toggle uppercase or lowercase, and include or exclude hyphens.
- Click 'Copy' to copy the UUIDs to your clipboard.
FAQ
- Can two UUID v4 values ever collide?
- The theoretical probability is roughly 1 in 5.3 x 10^36. You would need to generate 1 billion UUIDs every second for 85 years before having a 50% chance of a single collision.
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