UUID Generator: Create Unique IDs (v4, v1, nil)
Generate UUIDs in bulk, choose formats, and validate existing identifiers.
2026-01-065 min
UUID versions
v4 is random and most common. v1 is time-based. Nil UUIDs are placeholders.
Formatting options
Choose uppercase, lowercase, or without hyphens depending on your system.
FAQ
Can UUIDs collide?
Collisions are extremely unlikely for v4 at practical scales.