UUID Generator
Generate random UUID v4 identifiers using your browser's cryptographic random number generator. Make one or a hundred at once, nothing is sent anywhere.
What's a UUID v4?
128 bits of randomness, formatted as a standard identifier.
A UUID v4 is 122 random bits (the other 6 are fixed to mark the version and variant), giving roughly 5.3 undecillion possible values. Collisions are so unlikely they're not a practical concern for database primary keys, request IDs, or file names.
Common uses
Database primary keys that don't leak row counts, idempotency keys for API requests, correlation IDs for tracing logs across services, and unique file or session names that won't collide even generated on different machines at the same time.