UUID Suite (v1, v3, v4, v5, v6, v7)
A powerful and free online tool to handle UUID Suite (v1, v3, v4, v5, v6, v7) operations instantly in your browser. Fast, secure, and fully local by OrbitInfra.
Understanding UUID Version 4 and Global Uniqueness
A Universally Unique Identifier (UUID), also known as a GUID in Microsoft ecosystems, is a 128-bit label used to uniquely identify records across distributed computer systems without central coordination.
UUID Version 4 relies on cryptographic randomness: of its 128 bits, 122 bits are completely random, yielding 5.3 x 10^36 possible unique values. The probability of finding a collision is astronomically negligible.
How to Use
- Select whether you need a single UUID or bulk batch generation (up to 500 UUIDs).
- Toggle formatting options such as uppercase letters, hyphens, or braces.
- Click "Generate UUIDs" to produce fresh RFC 4122 compliant identifiers.
- Copy the generated identifiers directly into your database schema or code.
Key Features & Capabilities
- Generates strictly compliant RFC 4122 UUID v4 identifiers.
- Bulk generation capability producing up to 500 unique IDs simultaneously.
- Formatting toggles: uppercase/lowercase, with/without hyphens.
- Instant client-side generation powered by the Web Crypto API.
Common Developer Workflows
- Generating primary keys for distributed databases like PostgreSQL, Cassandra, or MongoDB.
- Creating unique session tokens and tracking cookies for web analytics.
- Assigning transaction IDs for financial checkouts and order processing systems.
- Simulating test database fixtures with realistic unique identifier data.
Frequently Asked Questions
What is the chance of two UUID v4 values colliding?
The collision probability is approximately 1 in 2.71 x 10^18. To put that in perspective, you would need to generate 1 billion UUIDs every second for 85 years to have a 50% chance of a single collision.
What is the difference between UUID and GUID?
GUID (Globally Unique Identifier) is Microsoft's implementation of the universal UUID standard. They share the same 128-bit format and structure.
What does the standard UUID format look like?
A standard UUID is formatted as 32 hexadecimal digits displayed in 5 groups separated by hyphens: `8-4-4-4-12` (e.g. `123e4567-e89b-12d3-a456-426614174000`).
