UUID Generator
Generate random UUID v4 strings instantly.
About the UUID Generator
Generate random UUID v4 strings for development and testing. Cryptographically random, RFC 4122 compliant.
Private by design
Everything you type here is processed inside your browser. Nothing is sent to a server, logged or stored, so it is safe to use with real numbers, drafts and anything you would not paste into a hosted tool.
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Questions people ask
What is a UUID?
A UUID (Universally Unique Identifier) is a 128-bit identifier formatted as a 36-character string (e.g., 550e8400-e29b-41d4-a716-446655440000). UUID v4 uses random generation.
Are generated UUIDs truly unique?
UUID v4 uses cryptographically secure random numbers. The probability of generating a duplicate is astronomically low (about 1 in 2^122).
Can I generate multiple UUIDs at once?
Yes. You can generate multiple UUID v4 strings at once for batch use in development and testing.