Online UUID / GUID Generator
Instantly generate bulk, standard-compliant Version 4 UUIDs (Universally Unique Identifiers) for database primary keys, session IDs, and API tokens.
1c460a48-ee79-489c-ab46-d4950d42638fHow to use UUID Generator
- 1
Enter or paste data into the box above
- 2
Click the "Generate UUID" button
- 3
Copy or download the result
Features of UUID Generator
What is UUID Generator?
A UUID (Universally Unique Identifier) or GUID (Globally Unique Identifier) is a 36-character string standardized by RFC 4122. This tool generates Version 4 UUIDs using the browser's secure random number generator (CSPRNG), ensuring true randomness and lack of predictability.
When to use?
- Creating collision-free Primary Keys for distributed databases
- Generating secure, untraceable tracking or session IDs for web applications
- Creating randomized, safe filenames for cloud storage uploads
Frequently Asked Questions
What are the chances of two UUID v4s colliding?
The probability of a collision (generating the same UUID twice) is astronomically small—practically zero (2^122 possibilities). You can confidently use them as globally unique identifiers without worrying about duplicates.
How is UUID version 4 different from other versions?
Version 1 uses the computer's MAC address and current time, which can leak device information. Version 4 is generated purely from random numbers, offering maximum security and independence, making it the most highly recommended version today.
Is a GUID the exact same thing as a UUID?
Yes. GUID (Globally Unique Identifier) is simply the terminology Microsoft uses for the UUID standard. Any valid GUID is also a valid UUID.