#
UUID Generator
NEWGenerate random UUID v4 values in bulk for free. Copy one or all at once. Useful for database primary keys, session tokens, and unique identifiers.
DeveloperFree • No signup • Works in browser
max 50
Generated UUIDs
Output will appear here...
Frequently Asked Questions
What is a UUID?+
A UUID (Universally Unique Identifier) is a 128-bit value used to uniquely identify information in computer systems, written as 32 hexadecimal digits in the format xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx.
What is the difference between UUID v4 and other versions?+
UUID v4 is randomly generated, making it the most common choice for general use. Other versions are based on timestamps or namespace hashing. v4 is preferred when you just need a unique value with no embedded metadata.
Is UUID the same as GUID?+
Yes. GUID (Globally Unique Identifier) is Microsoft's name for the same concept. They follow the same format and are interchangeable.
Can two UUIDs ever be the same?+
The probability is astronomically small — roughly 1 in 5.3 × 10^36. In practice, UUID v4 collisions are considered impossible for any real-world use case.
Are these UUIDs safe to use in a database?+
Yes. This tool uses the browser's built-in Web Crypto API (crypto.randomUUID) to generate cryptographically secure random values suitable for production use.