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Generate high-entropy Version 4 UUIDs (Universally Unique Identifiers) instantly.
Reliable UUID Generation for Developers
A Universally Unique Identifier (UUID) is a 128-bit number used to identify information in computer systems. Our UUID Generator creates Version 4 UUIDs, which are generated based on random numbers. This ensures a virtually zero probability of duplication, making them perfect for database primary keys, session identifiers, and transaction IDs in distributed systems. Whether you need a single ID or a batch for testing, our tool provides clean, standard-compliant strings that follow the RFC 4122 specification. It is a critical utility for backend engineers, database administrators, and software architects who need unique identifiers without the overhead of a central authority.
How to Use
- Choose the quantity of UUIDs you need.
- Select the format (e.g., standard or uppercase).
- Click ‘Generate UUID’ to create the IDs.
- Copy the generated strings to your clipboard for use in your code.
FAQ
- What is a Version 4 UUID? It is a UUID generated entirely from random or pseudo-random numbers.
- Can a UUID duplicate? While theoretically possible, the probability is so low it is treated as zero in practice.
- Is a UUID the same as a GUID? Yes, GUID (Globally Unique Identifier) is Microsoft’s term for the same standard.
- How many bits is a UUID? It is 128 bits, represented as 32 hexadecimal characters.
- Is it free? Yes, like all developer utilities on SmartToolCentral.
Last Updated: June 24, 2026 | Author: Victor Binyi Tumenta