UUID Generator
What is UUID Generator? (Quick Answer)
Generate UUID/GUID Free online tool, no registration required, 100% client-side processing.
Generate UUID/GUID
By Craftisle Team
About UUID Generator — Free Online Tool
How to Use UUID Generator — Step by Step
- Choose UUID version
Select UUID v4 (random) — the most commonly used version.
- Set batch size
Choose how many UUIDs to generate (1-100).
- Choose format
Toggle hyphens on/off, and uppercase/lowercase hex digits.
- Generate and copy
Click Generate. Copy individual UUIDs or all at once.
Use Cases for UUID Generator
Database primary keys
Generate unique IDs for distributed databases where auto-increment is not feasible.
API resource IDs
Assign unique identifiers to API resources (users, orders, products) in microservices.
Test data generation
Generate unique IDs for test fixtures and mock data.
FAQ — UUID Generator Free Online Tool
What is the collision probability of UUID v4?
Extremely low. With 122 random bits, you need to generate 2^61 UUIDs before a collision becomes likely. Practically zero for most applications.
Should I use UUID v4 or v7?
v4 is random (no time info). v7 includes a timestamp, making it sortable by creation time. v7 is better for database indexing.
Is this compliant with RFC 4122?
Yes. UUIDs generated follow RFC 4122 v4 format: xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx where y is 8, 9, a, or b.