UUID v4 Generator

UUID v4 relies on random numbers. It uses 122 bits of entropy, making the probability of a collision practically zero even in massive scale systems and global databases.

Yes, UUID v4 is widely used as a primary key in modern databases like PostgreSQL and MongoDB because it prevents ID guessing and simplifies data merging between servers.

A UUID v4 consists of 32 hexadecimal characters displayed in five groups separated by hyphens (8-4-4-4-12), with a total length of 36 characters including the four hyphens.