How to generate UUIDs in 3 easy steps
- 1
Choose how many you need
Set the count between 1 and 100 using the selector.
- 2
Pick a format
Choose lowercase (standard), uppercase, or the braced {xxxxxxxx-...} style used in some codebases.
- 3
Copy the list
Click the copy button to place all UUIDs on your clipboard, ready to paste into code or a database seed.
Why use the uuid generator tool from Super Utility Hub?
Generate cryptographically secure UUID v4 identifiers instantly. UUIDs (Universally Unique Identifiers) are the standard way to give database rows, API resources, and distributed system events unique IDs without a central counter.
This generator uses your browser's native crypto.randomUUID() — the same source of randomness trusted by operating systems — and can produce anywhere from 1 to 100 UUIDs at once. Choose uppercase, lowercase, or braces-and-dashes variants, then copy the whole list with one click.
Generation is instant and entirely local. No server, no tracking, no uploads. Free and unlimited.
- Processes everything in your browser — no upload servers involved
- Free forever with unlimited uses
- Works on Windows, macOS, Linux, Android and iOS
- No watermark or branding on your output, ever
Frequently asked questions
Are these UUIDs truly random?
Yes. They're generated with crypto.randomUUID(), which uses the browser's cryptographically secure random source — suitable for production identifiers.
What is a UUID v4?
Version 4 UUIDs are randomly generated — 122 bits of entropy encoded as 32 hex characters. The version (4) and variant bits are fixed, everything else is random.
Can two generated UUIDs collide?
Practically never. With 122 random bits, the chance of a collision across billions of IDs is astronomically small — that's the entire point of UUIDs.
Do UUIDs work offline?
Yes. Generation uses the browser's built-in crypto API with no network calls, so it works even without an internet connection.