UUID GENERATOR
Why Use a UUID Generator?
A UUID (Universally Unique Identifier) is a standardized way to create identification numbers for software architecture. Unlike simple sequential integers (1, 2, 3), UUIDs ensure uniqueness across different databases, servers, and networks without needing a central authority to coordinate them.
Common Uses
- Database Keys: Unique primary keys for database records (SQL & NoSQL).
- Session IDs: Secure tokens for tracking user sessions.
- File Names: Preventing filename collisions in uploaded content.
How Version 4 Works
This tool generates Version 4 UUIDs. Unlike other versions based on time or MAC addresses, v4 is completely random. We generate 122 random bits using your browser's secure cryptographic API to ensure maximum entropy and uniqueness.
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Frequently Asked Questions
What is a UUID?
UUID stands for Universally Unique Identifier. It is a 128-bit number used to identify information in computer systems. The standard format is represented as 32 hexadecimal digits displayed in 5 groups (8-4-4-4-12).
Is this UUID truly unique?
Yes. This tool generates Version 4 UUIDs using a cryptographically secure random number generator. The probability of generating a duplicate is so infinitesimally small that it is effectively impossible in practice.
Does this tool work offline?
Yes. The generation happens 100% in your browser using the crypto.randomUUID() API. No data is sent to a server.
What is the difference between UUID and GUID?
There is effectively no difference. GUID (Globally Unique Identifier) is simply Microsoft's specific implementation of the UUID standard. They are used interchangeably in most developer contexts.