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GUID Generator
Generate up to 5,000 cryptographically random, collision-safe UUID v4s.
Each GUID is built from 122 bits of randomness sourced via crypto.getRandomValues() (not Math.random — that's not cryptographically random). The chance of two ever colliding is astronomically small. As an extra safety net, this page also remembers every GUID it has generated in this browser and will never hand out the same one twice here.
Format:
Encoding:
Real UUID v4s from
crypto.getRandomValues() — see the note above for the uniqueness guarantee.Your Daily Fortune:
(click "Generate some GUIDs!" button to view)