Random UUID Generator
Generate random UUIDs (v4) — universally unique identifiers for database keys, tokens, and IDs.
About Random UUID Generator
This tool generates random uuid data using the browser's cryptographically secure random number generator (crypto.getRandomValues). All data is generated locally in your browser — nothing is sent to any server. Useful for populating test databases, creating seed data, UI mockups, and testing forms.
FAQ
How unique are UUID v4 values?
UUID v4 generates 122 random bits per UUID. The probability of generating two identical UUIDs is approximately 1 in 5.3×10^36 — effectively impossible in practice. Even generating 1 billion UUIDs per second for a trillion years, the probability of a collision is still less than 1 in a billion. UUIDs are safe to use as unique identifiers in databases, distributed systems, and any application requiring uniqueness without coordination.