Generate UUID v4 (random) and other UUID versions online. Create unique identifiers for databases and APIs.
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Go to the UUID Generator on UtilsNow. Generate universally unique identifiers instantly.
Select UUID v4 (random, most common), UUID v1 (timestamp-based), or other versions based on your needs.
Click Generate to create a single UUID, or specify a count to generate multiple UUIDs at once.
View the UUID in standard format (with hyphens), compact format (no hyphens), or uppercase.
Copy the UUID(s) for use as database primary keys, API tokens, session IDs, or unique filenames.
Use our free UUID Generator tool — no signup, no uploads, works directly in your browser.
Open UUID GeneratorUUID (Universally Unique Identifier) is a 128-bit identifier that is practically unique worldwide. The chance of collision with UUID v4 is approximately 1 in 5.3 x 10^36.
UUID and GUID (Globally Unique Identifier) are the same thing. UUID is the standard term (RFC 4122), while GUID is Microsoft's terminology.
UUID v4 (random) is the most commonly used. It is simple, has no privacy concerns (unlike v1 which includes MAC address), and has an extremely low collision probability.