Generate UUIDs instantly with our free online UUID generator. Supports UUID v1, v4, v7, and GUID. Validate, decode, and generate bulk UUIDs for development and security needs.
Generate multiple UUIDs at once using your selected settings.
Enter a UUID to check if it's valid.
Enter a UUID to decode its components.
A UUID (Universally Unique Identifier) is a randomly generated identifier used for secure and unique identification in software development, databases, and APIs. Whether you need UUID v1, v4, or v7, our free online UUID generator makes it fast and simple.
With this tool, you can:
No need to install software—just paste, generate, and copy in seconds.
A UUID is a 128-bit identifier commonly used in databases, distributed systems, and cryptographic applications. It consists of hexadecimal characters and ensures that identifiers are globally unique, even across different systems.
UUIDs are often used to:
Our online UUID generator supports multiple UUID versions based on different use cases:
| UUID Version | Use Case |
|---|---|
| UUID v1 | Uses timestamp and MAC address for uniqueness. Best for time-ordered databases. |
| UUID v4 | Randomly generated, most commonly used for API keys, authentication, and security. |
| UUID v7 | Latest standard, optimized for sorting and indexing in databases. |
| GUID | Microsoft’s implementation of UUID, commonly used in Windows-based applications. |
UUIDs are created based on:
Need multiple UUIDs? Use our Bulk UUID Generator to create up to 500 UUIDs at once!
UUIDs are generated using different methods based on their version. UUID v1 uses a timestamp, UUID v4 is random, and UUID v7 is optimized for sorting.
Yes, UUIDs have a very high probability of uniqueness, especially UUID v4 and v7, which use strong randomization algorithms.
UUIDs do not store sensitive information, but UUID v1 and v7 contain timestamp data, which can be extracted.
UUIDs are widely used in databases, API authentication, distributed systems, and cryptographic security.
No, UUIDs are not case-sensitive, meaning a1b2c3d4-e5f6 is the same as A1B2C3D4-E5F6.
A GUID (Globally Unique Identifier) is a UUID implementation by Microsoft for Windows applications.
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