# UUID Generator > Generate cryptographically secure version 4 UUIDs locally; bookmarkable URLs save the quantity, not generated UUIDs. Page: https://askcalculators.com/calculator/uuid-generator/ Definition: https://askcalculators.com/calculator/uuid-generator/definition.json JSON Schema: https://askcalculators.com/calculator/uuid-generator/schema.json Version: 7.0.0 Maintained by: AskCalculators (software project; not a credentialed reviewer) Qualified review: pending. Automated checks do not establish professional approval. Page status: Live Review status: Pending ## Use Open the calculator page and enter values. Query-string parameters can restore and bookmark a calculation. Example: https://askcalculators.com/calculator/uuid-generator/?count=5 ## Inputs - count: Count; type=number; optional; default=5 ## Outputs - result: Result; format=text; primary ## Formula Each UUID is generated as RFC 4122/9562 version 4 using cryptographically secure random bytes with version and variant bits set. ## Rules - Empty optional inputs are undefined, not zero. - Hidden conditional inputs are ignored. - Do not invent missing required inputs.