Is the uuid generator free?

Yes — 100% free, no signup, no usage limits.

Does it save my data?

No. Inputs are processed in your browser and never uploaded to a server.

Can I use it on mobile?

Yes. The interface is fully responsive and works on iOS and Android.

What's the difference between UUID v4 and v7?

v4 is fully random — great for unpredictability. v7 starts with a millisecond timestamp, so IDs generated later sort after earlier ones, which improves database B-tree index locality.

Are these UUIDs cryptographically random?

Yes. They use the browser's crypto.getRandomValues / crypto.randomUUID, the same source backing security primitives.

UUID Generator — v4 & v7 Online

Generate cryptographically random UUIDs in bulk. Pick UUID v4 (random) or v7 (time-ordered).

Count

5945a386-1c0d-4598-859f-39592a1e5cd4
1f175b55-2fb8-453d-8c37-02b5fcf0cb40
8a9833d5-c8c2-4cf4-ac97-20c0f8959f0b
5c71f117-99aa-491b-878f-4cf1f6d33b87
aa32d600-6c74-4abb-b8bd-20c466d0ca6d

How to use

Step 1: Pick v4 or v7
Step 2: Set how many to generate
Step 3: Click Generate
Step 4: Copy one or copy all

Frequently asked questions

A UUID (Universally Unique Identifier) is a 128-bit value used to label rows in databases, log entries, and distributed-system messages without coordination.