UUID Generator
Generate cryptographically secure UUIDs (Universally Unique Identifiers) in v1, v4, and v7 format. Generate up to 1000 UUIDs at once, copy individually or in bulk.
Version 4 · 128-bit random · Cryptographically secure (Web Crypto API)
UUID Versions
v1: Time-based + node (MAC address) v4: Completely random (128 bits) v7: Unix timestamp milliseconds + random Format: xxxxxxxx-xxxx-Mxxx-Nxxx-xxxxxxxxxxxx M = version, N = variant
Examples
v4 UUID
Result: 550e8400-e29b-41d4-a716-446655440000
Cryptographically random UUID, safe for distributed systems.
Bulk generate
Result: 10 unique UUIDs ready to copy
Generate as many UUIDs as needed in one click.
Frequently Asked Questions
Is UUID v4 truly unique?
Practically yes. With 122 bits of randomness, the probability of collision is astronomically low — you'd need to generate billions of UUIDs per second for thousands of years to get a collision.
When should I use UUID v7?
UUID v7 includes a millisecond-precision timestamp, making it sortable by time. Prefer v7 for database primary keys as it improves index performance.