Loading...
Loading...
Generated using cryptographically secure random numbers
A UUID is a 128-bit label used for information in computer systems. The term GUID (Globally Unique Identifier) is also commonly used, particularly in Microsoft ecosystems. The main purpose of a UUID is to enable distributed systems to uniquely identify information without significant central coordination. This means you can generate a UUID on one machine and be practically certain it won't conflict with a UUID generated elsewhere.
Not all UUIDs are created equal. Depending on your use case, you might need a specific version:
Our tool provides a robust and secure way to generate identifiers for your projects:
crypto.randomUUID() API to ensure high-quality randomness.UUIDs are used everywhere in software engineering, from database primary keys and session identifiers to transaction IDs and filename generation. They are particularly valuable in microservices architectures where centralized ID generation can become a bottleneck.
For most practical purposes, they are the same. UUID is the standard term (Universally Unique Identifier), while GUID (Globally Unique Identifier) is the term popularized by Microsoft. Both refer to 128-bit unique identifiers.
While theoretically possible, the probability of a collision with UUID v4 is so low that it is considered impossible for all practical purposes. You would need to generate billions of UUIDs every second for many years to have even a small chance of a duplicate.
Use UUID v5 when you need a unique identifier that is consistently tied to a specific input (like a URL or a username). This is useful for creating stable IDs across different systems without needing a central database.