UUID Generator
Generate random UUIDs (Universally Unique Identifiers) for your projects. Fast, secure, and free online tool.
Use the navigation above, or the dropdown below to select the type of UUID you want to generate.
UUID v4 Generator
Generate random UUIDs (Universally Unique Identifiers) for your projects
ID Type
Quantity
What is a UUID v4?
UUID v4 is a randomly generated UUID that uses a cryptographically secure random number generator. It is the most popular UUID version for general use. A UUID v4 is made up of 122 random bits, with 6 bits reserved for version and variant information. This makes collisions extremely unlikely, even at very high volumes. UUID v4s are ideal for cases where you need a unique identifier that does not reveal any information about the time or place of creation. They are widely used for database keys, session tokens, and anywhere a unique, opaque ID is needed.
Format
UUID v4 consists of random or pseudo-random numbers, with version 4 and variant bits set
xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxxCommon Use Cases
- Session IDs
- API keys
- Unique identifiers
About This Tool
Our UUID v4 Generator allows you to quickly generate unique identifiers for your projects. You can generate up to 100 IDs at once, and easily copy them to your clipboard with a single click.
FAQ
What's the difference between UUID v1 and v4?
UUID v1 includes timestamp and device info (sortable but less private). UUID v4 is completely random (more private, not sortable).
Are UUID collisions possible?
Technically yes, but extremely unlikely. You'd need to generate trillions of UUIDs to have a reasonable chance of a single collision.
Are UUIDs good for database IDs?
Yes, especially in distributed systems. For best database performance, consider the newer UUID v7 which combines time ordering with randomness.