Should I use v4 or v7?

v7 for database primary keys (sortable, indexes well). v4 for session tokens or anywhere unpredictability matters.

Are these cryptographically secure?

Yes — we use the browser's Web Crypto API for randomness.

UUID Generator

Generate UUIDs in bulk — v4 (random) or v7 (time-ordered). Optional uppercase and braces.

Version Count UPPERCASE tool.uuid-generator.braces

tool.uuid-generator.uuids

Was this tool helpful?

Send output to:

How to use UUID Generator

Pick a version and count.
Click Generate.
Copy the list.

What is UUID Generator?

UUIDs are 128-bit identifiers that are practically unique without coordination. Version 4 is purely random — best for unguessable IDs. Version 7 embeds a timestamp at the start, so generated UUIDs sort chronologically (great for database primary keys).

FAQ

Should I use v4 or v7?: v7 for database primary keys (sortable, indexes well). v4 for session tokens or anywhere unpredictability matters.
Are these cryptographically secure?: Yes — we use the browser's Web Crypto API for randomness.

Related tools

Author

1Stop Tools"The Toolsmith"

Editorial Team at 1Stop Tools

The 1Stop Tools editorial team tests, reviews, and curates every utility on this platform. We believe tools should be free, fast, and private, with no accounts, no uploads, and no tracking. Every tool on this site runs entirely in the browser, and we test on multiple devices and browsers to ensure reliability for everyone, everywhere, on any connection.

📖 UUID Generator on Wikipedia·Generators on Wikipedia·UUID Generator on Britannica

People also use

← Back to Generators · All tags

UUID Generator

Something went wrong

How to use UUID Generator

What is UUID Generator?

FAQ

Related tools

Author

People also use

Ad blocker detected

Keyboard shortcuts