UUID Generator
Generate version 4 UUIDs (Universally Unique Identifiers) instantly in your browser. No server, no tracking.
How to use the UUID generator
- 1. Choose how many UUIDs you need (1–50).
- 2. Click Generate.
- 3. Copy individual UUIDs or use the Copy button to copy all at once.
What are UUIDs used for?
UUIDs are used as unique identifiers in databases, APIs, distributed systems, and file names. Because they are generated independently without a central authority, they are ideal for identifying records in systems where multiple sources create data simultaneously.
FAQ
What is a UUID v4?
UUID v4 is a randomly generated 128-bit identifier in the format xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx. It is designed to be unique across time and space without requiring a central registry.
Are these UUIDs cryptographically secure?
This generator uses the browser's built-in crypto.randomUUID() when available, which is cryptographically secure. On older browsers it falls back to Math.random().
Can I use generated UUIDs in my production app?
Yes. UUID v4 values have extremely low collision probability and are suitable for use as database primary keys, session tokens, and unique identifiers in applications.