UUID Generator
Generate universally unique identifiers (UUIDs) instantly. Create single or multiple UUIDs for your projects.
e9b39b2c-b212-4ed3-b6cf-ae63ea6a700f About UUIDs
A UUID (Universally Unique Identifier) is a 128-bit identifier that is designed to be unique across all systems without requiring a central registration authority. This makes UUIDs ideal for distributed systems and databases.
UUID Format
UUIDs are displayed as 36 characters in the format: xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx where each x is a hexadecimal
digit (0-9 or a-f).
Common Use Cases
- Database primary keys
- Distributed system identifiers
- Session tokens and API keys
- File and resource naming
- Tracking and analytics
Privacy
All UUIDs are generated entirely in your browser using the Web Crypto API. Nothing is sent to any server or stored anywhere.
Frequently Asked Questions
Common questions about UUIDs and this generator
What is a UUID?
UUID stands for Universally Unique Identifier. It is a 128-bit identifier that is designed to be unique across all space and time. UUIDs are commonly used in databases, distributed systems, and software development.
What version of UUID is generated?
This tool generates UUID version 4 (UUIDv4), which uses random or pseudo-random numbers. UUIDv4 is the most commonly used version for generating unique identifiers in applications.
Are the UUIDs cryptographically secure?
Yes, UUIDs are generated using your browser's built-in crypto.randomUUID() function, which uses a cryptographically secure random number generator.
Are UUIDs truly unique?
While not mathematically guaranteed to be unique, the probability of generating a duplicate UUID is astronomically small (about 1 in 5.3 billion billion). For practical purposes, they can be considered unique.