What is a UUID?
UUID stands for Universally Unique Identifier. It is a 128-bit value used to uniquely
identify data across systems, databases, APIs, IoT devices, and distributed applications.
Types of UUID Supported
- UUID v1: Based on timestamp + hardware MAC address
- UUID v4: Completely random (most widely used)
- UUID v5: Created using a namespace + name string (deterministic)
Use Cases of UUIDs
- 🔹 Database primary keys
- 🔹 API authentication tokens
- 🔹 Session IDs and cookies
- 🔹 Cloud microservices
- 🔹 Distributed applications
- 🔹 Tracking user devices
Why Use This UUID Generator?
- ✔ Supports UUID v1, v4, and v5
- ✔ Bulk UUID generation
- ✔ Namespace mode for deterministic UUIDs
- ✔ Copy & download in one click
- ✔ Dark mode for better readability
- ✔ 100% free and secure
FAQs
1. Is UUID unique?
Yes. UUID v4 has 2⁶⁴ random possibilities, making collisions extremely unlikely.
2. What is UUID v5 used for?
UUID v5 is used when you need the same inputs (namespace + name) to generate the same UUID every time.
3. Are UUIDs secure?
UUID v4 is random but not cryptographically secure. For sensitive data, use tokens or JWT.