UUID Generator
Create RFC 4122-compliant version 4 UUIDs with your browser's cryptographic random generator — perfect for database keys, test data and distributed systems.
FAQ
What is a UUID v4?
A 128-bit random identifier formatted as 8-4-4-4-12 hex digits. Version 4 is random, so collisions are astronomically unlikely (~1 in 10^36 for a bulk batch).
Are these cryptographically secure?
Yes — generated with crypto.getRandomValues(), suitable for real production identifiers.
Can I generate many at once?
Yes, up to 100 UUIDs per click, with uppercase and no-hyphen options.