UUID Generator - Generate Unique Identifiers (UUID v4)
Generate universally unique identifiers (UUID v4) instantly. Perfect for database keys, session IDs, and unique references.
Maximum: 100 UUIDs
How This Tool Works
This tool generates UUID version 4 (random) identifiers according to RFC 4122 standards. Each UUID is a 128-bit value represented as 32 hexadecimal digits, displayed in five groups separated by hyphens. The generation uses random numbers to ensure uniqueness with an extremely low probability of collision.
Why Use This Tool
- ✓Generate RFC 4122 compliant UUID v4 identifiers
- ✓Create multiple UUIDs at once (up to 100)
- ✓Extremely low collision probability
- ✓Perfect for database primary keys and unique identifiers
- ✓Instant generation with no server required
- ✓Copy all UUIDs with a single click
Frequently Asked Questions
What is a UUID?
UUID stands for Universally Unique Identifier. It's a 128-bit value used to uniquely identify information in computer systems. UUIDs are designed to be unique across space and time without requiring a central registration authority.
What is UUID v4?
UUID version 4 is a randomly generated UUID. Unlike other versions that may use timestamps or hardware addresses, v4 UUIDs are generated using random or pseudo-random numbers, making them ideal for most use cases.
How unique are these UUIDs?
UUID v4 has approximately 5.3 × 10³⁶ possible values. The probability of generating a duplicate is so low that it's considered negligible for practical purposes. You would need to generate billions of UUIDs per second for many years to have a reasonable chance of collision.
Can I use these UUIDs in my database?
Yes! UUIDs are commonly used as primary keys in databases. They're especially useful in distributed systems where you need to generate unique IDs without coordinating with a central authority.
Are these UUIDs secure?
While UUIDs are unique, they should not be used as security tokens or passwords. They are predictable in pattern and not designed for cryptographic purposes. Use proper security tokens for authentication and authorization.