UUID Generator
Generate cryptographically random UUID v4 identifiers one at a time or in bulk, with optional uppercase and hyphen-free formats.
Result
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Frequently asked questions
What version of UUID does this generate?+
Version 4 (random) UUIDs, generated using your browser's cryptographically secure random number generator.
Can I generate UUIDs without hyphens?+
Yes, toggle "Without hyphens" to get a 32-character hex string instead of the standard 8-4-4-4-12 format.
Are these UUIDs guaranteed unique?+
Practically yes. UUID v4 has 122 random bits, which makes collisions astronomically unlikely.