UUID Generator
Generate universally unique identifiers (UUIDs / GUIDs) version 4.
Developer Tools
UUID Generator (Version 4)
Generate universally unique identifiers (UUIDs) with a single click.
Generates Version 4 UUIDs using `crypto.randomUUID()`.
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Overview
The UUID Generator creates Version 4 UUIDs (Universally Unique Identifiers), also known as GUIDs (Globally Unique Identifiers). These are 128-bit numbers used to uniquely identify information in computer systems without requiring a central coordinating authority. Version 4 UUIDs are generated using random or pseudo-random numbers.
Use Cases
- Assigning unique primary keys to database records.
- Generating unique transaction IDs or session identifiers.
- Creating unique IDs for objects or resources in distributed systems.
- Labeling assets or entities where uniqueness is critical.
- Any scenario requiring a globally unique identifier with an extremely low probability of collision.
How It Works
When you click the "Generate UUID" button, the tool utilizes the `crypto.randomUUID()` method provided by modern web browsers. This method generates a cryptographically strong random Version 4 UUID, conforming to RFC 4122. The generated UUID is then displayed in the output field.
Tips for Better Usage
- Version 4 UUIDs are the most common type and are suitable for most general-purpose unique ID needs.
- The probability of collision for v4 UUIDs is astronomically low, making them practically unique.
- UUIDs are typically represented as a 32-character hexadecimal string, often with hyphens: `xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx`.