Generate universally unique identifiers (UUIDs) for your applications
A UUID (Universally Unique Identifier) or GUID (Globally Unique Identifier) is a 128-bit identifier that is unique across both space and time.
A UUID (Universally Unique Identifier) or GUID (Globally Unique Identifier) is a 128-bit identifier that is unique across both space and time. UUIDs are commonly used as database primary keys, session IDs, authentication tokens, file names, API request tracking IDs, and identifiers in distributed systems.
UUID v4 uses random number generation to create identifiers and is the most commonly used version for general purposes. UUID v1 is timestamp-based and includes the current time and MAC address of the generating computer, making it useful when you need time-ordered identifiers or want to trace the source.
UUID v4 uses cryptographically strong random number generation, making collisions extremely unlikely. With 122 random bits, the probability of generating duplicate UUIDs is astronomically low, making them secure for use as unique identifiers in production applications.
Yes, this tool allows you to generate up to 100 UUIDs in a single batch. Simply specify the number of UUIDs you need, and the tool will generate them instantly. You can copy all generated UUIDs at once or copy them individually.
No, all UUID generation happens entirely in your browser using JavaScript. No data is stored on servers or transmitted over the network. Your generated UUIDs remain completely private and secure.
The tool offers uppercase formatting and the option to remove dashes from UUIDs. You can generate standard lowercase UUIDs with dashes (e.g., 550e8400-e29b-41d4-a716-446655440000), uppercase versions, or compact versions without dashes for different use cases.
While no system can guarantee absolute uniqueness, UUID v4 has such a large number space (2^122 possible values) that the probability of collision is negligible for practical purposes. The chance of generating duplicate UUIDs is approximately 1 in 5.3 x 10^36.
Yes, the generated UUIDs follow the RFC 4122 standard and are suitable for production use in databases, APIs, distributed systems, and any application requiring unique identifiers. They are widely supported across programming languages and platforms.