UUID Generator
Generate random UUIDs (v4 or v7)
UUID Generator
Configure options below and click Generate to create new UUIDs
How to Use
- 1Select how many UUIDs you want to generate
- 2Choose UUID version (v4 random or v7 time-ordered)
- 3Click Generate to create new UUIDs
- 4Copy or download the generated UUIDs
UUID Versions
UUID v4 (Random)
The most common UUID version. Generated using random or pseudo-random numbers. Virtually impossible to generate duplicates (1 in 5.3×10^36 chance).
UUID v7 (Time-ordered)
A newer UUID version that embeds a Unix timestamp in the first 48 bits. UUIDs sort chronologically, making them ideal for database primary keys where insertion order matters for performance.
What is a UUID?
A UUID (Universally Unique Identifier) is a 128-bit identifier that is guaranteed to be unique across all time and space. UUIDs are commonly used in databases, distributed systems, and anywhere you need unique identifiers without a central authority.
The standard format is 8-4-4-4-12 hexadecimal digits: xxxxxxxx-xxxx-Mxxx-Nxxx-xxxxxxxxxxxx, where M indicates the version and N indicates the variant.
FAQ
Are these UUIDs truly unique?
Yes, for practical purposes. The probability of generating duplicate UUIDs is astronomically low. You would need to generate 1 billion UUIDs per second for about 85 years to have a 50% chance of a collision.
Which version should I use?
Use v4 for general purposes. Use v7 if you need time-ordered IDs (e.g., for database primary keys where insert performance matters).
Is GUID the same as UUID?
Yes. GUID (Globally Unique Identifier) is Microsoft's term for UUID. They are the same thing.