UUID Generator
Free UUID generator. Generate one or multiple version 4 universally unique identifiers (UUID v4) with a single click. Copy to clipboard instantly for use in databases, APIs, and applications.
What Is a UUID?
A UUID (Universally Unique Identifier) is a 128-bit identifier used to uniquely identify information in computer systems. Its standard format consists of 32 hexadecimal digits separated by hyphens: xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx.
What Is UUID Version 4?
UUID v4 generates identifiers using random numbers. It is the most widely used version because it does not require external information such as a MAC address or timestamp. The probability of generating two identical UUIDs is practically zero.
How to Use This Generator
Select the number of UUIDs you want to generate (1 to 50), choose between uppercase or lowercase, and click Generate. You can copy each UUID individually or all of them at once.
Frequently Asked Questions
Are the generated UUIDs truly unique?
Yes, UUID v4 uses cryptographic random number generation. The probability of collision is approximately 1 in 2^122, making it virtually impossible to generate two identical values.
What are UUIDs used for?
UUIDs are used as unique identifiers in databases, APIs, distributed systems, session tokens, and any context where a non-repeating identifier is needed.