🆔UUID Generator

How to Use

1. 1

   Set count

   Choose how many UUIDs to generate (1–100).

2. 2

   Configure format

   Toggle uppercase and hyphen options to match your needs.

3. 3

   Generate

   Click "Generate" to create fresh UUID v4 values.

4. 4

   Copy

   Click any UUID to copy it, or use "Copy All" to copy the full list.

FAQ

What is a UUID v4?

UUID v4 (Universally Unique Identifier version 4) is a 128-bit random identifier formatted as 32 hexadecimal digits separated by hyphens: xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx. Version 4 means the values are randomly generated.

Are these UUIDs truly unique?

UUID v4 uses 122 random bits, giving approximately 5.3 × 10^36 possible values. The probability of a collision is astronomically small and negligible for practical purposes.

Is this tool safe to use?

Yes. UUIDs are generated using the browser's built-in crypto.randomUUID() API (Web Crypto API). No data is sent to any server — everything happens locally in your browser.

What's the difference between UUID and GUID?

GUID (Globally Unique Identifier) is Microsoft's term for the same concept. They are structurally identical and interchangeable in most contexts.

When should I use a UUID?

UUIDs are ideal as primary keys in databases, session tokens, correlation IDs for logging, file names for uploaded assets, and any situation where you need a collision-resistant unique identifier without a central coordinator.