UUID Generator Guide
A Universally Unique Identifier (UUID) is a 128-bit label used for identification in computer systems. Because UUIDs have an extremely low probability of duplication, they can be generated independently without coordination from a central authority. This tool supports generating UUID Version 1 (based on system time and hardware address), Version 4 (fully random), and Version 7 (ordered based on time/epoch), which are commonly used as primary keys in databases.
⚙️ Key Features
- Generates single or bulk quantities of high-entropy UUIDs instantly.
- Supports Version 1 (timestamp-based), Version 4 (cryptographically random), and Version 7 (time-ordered).
- Configurable output formats: standard lowercase, uppercase, or raw continuous hexadecimal.
- Bulk export to text files or direct clipboard copies.
📖 How to Use
- Select the UUID version you require (v4 is recommended for general random keys).
- Choose the quantity of identifiers you need to generate.
- Configure case styling (lowercase or uppercase) and hyphen settings.
- Click 'Generate' and copy the list from the output panel.
All UUID generation runs client-side using browser-native cryptography APIs. No generated identifiers are sent or logged on the server.
Frequently Asked Questions (FAQ)
What is the difference between UUID v4 and v7?
UUID v4 is completely random and offers no ordering. UUID v7 combines a 48-bit Unix timestamp with random bits, making it sequentially orderable. This makes UUID v7 much better for database indexing and sorting.
Is there a chance of two UUIDs being identical?
The probability of a collision in UUID v4 is incredibly low. To put it in perspective, you would need to generate billions of UUIDs per second for hundreds of years to have a 50% chance of a single collision.
Are the generated keys cryptographically secure?
Yes, our generator utilizes the Web Crypto API's secure random number generator (`crypto.getRandomValues`) to ensure the generated keys are cryptographically secure and unpredictable.