UUID Generator
Generate one or many secure UUID v4 identifiers.
100% client-side — your data never leaves your browser.
About the UUID Generator
Generate cryptographically secure UUID v4 identifiers — one at a time or hundreds at once. Built on the browser's Web Crypto API, every UUID is truly random and ready to drop into databases, APIs, or test data.
How to use the UUID Generator
- 1Set how many UUIDs you want to generate (1 to 500).
- 2Click "Generate" to create the batch instantly.
- 3Click any UUID to copy it on its own, or use "Copy all".
- 4Optionally toggle uppercase or wrap each UUID in braces.
Why use our UUID Generator
Truly random
Powered by crypto.randomUUID() so every identifier is cryptographically secure.
Bulk generation
Generate up to 500 UUIDs at once and copy them all in a single click.
Format options
Toggle uppercase or wrap each UUID in {braces} for SQL Server, Windows, and similar systems.
Private & free
Generation happens in your browser — UUIDs are never sent to a server or logged.
Frequently asked questions
What is a UUID v4?+
A UUID v4 is a 128-bit identifier generated from random data, written as 32 hex digits in 8-4-4-4-12 groups (e.g. 7c9e6679-7425-40de-944b-e07fc1f90ae7). The chance of collisions is so small they're treated as globally unique.
Are these UUIDs safe to use in production?+
Yes. They're generated with the browser's Web Crypto API (the same source modern servers use) and follow the RFC 4122 v4 format.
Can I generate more than 500 at once?+
The tool caps each batch at 500 to keep the page responsive. Generate multiple batches if you need more — they're still unique.
Are the generated UUIDs stored?+
No. UUIDs only exist in your browser tab until you close it. Copy any you want to keep.