UUID Generator
Generate UUID v4 (fully random) or UUID v7 (time-ordered, great as a database primary key) identifiers instantly, in whatever quantity you need. Everything runs locally in your browser using the Web Crypto API — nothing is ever uploaded.
Frequently asked questions
What's the difference between UUID v4 and UUID v7?
UUID v4 is fully random — it reveals no ordering or timing information. UUID v7 embeds a millisecond timestamp at the start, so UUIDs generated in sequence sort chronologically, which is very useful as a database primary key since it improves index performance compared to v4.
Are these UUIDs uploaded anywhere?
No, they are generated locally in your browser using the Web Crypto API (crypto.getRandomValues); nothing is sent to a server.
How safe are they against collisions?
A UUID v4 has 122 random bits — the odds of two generators producing the same value are practically zero (you'd need to generate billions per second for years to have a realistic chance of a collision).
What is a UUID used for?
UUIDs are used as unique identifiers for database records, sessions, API requests, file names, and any case where you need a unique ID without coordinating with a central server.