UUID Generator
Generate random UUIDs (version 4). Uses the browser’s crypto API for secure randomness. Generate one or several at once.
Generate UUID
Click Generate.
How it works
We use crypto.getRandomValues to fill 16 bytes and format them as UUID v4 (random). If crypto.randomUUID exists we use it; otherwise we build the string manually.
When to use it
Use for unique IDs in apps, databases, or APIs when you need a standard UUID format.
Frequently asked questions
- UUID v4 vs v1? v4 is random; v1 includes timestamp and MAC. We generate v4 only.