UUID Generator
Generate random version-4 UUIDs, one at a time or in bulk, ready to copy.
100% private — everything runs in your browser and nothing is sent to a server.
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The UUID Generator produces random version-4 UUIDs (also called GUIDs) using your browser's secure random generator. Generate a single ID or a whole batch for seeding databases, test data or unique keys — all locally, with nothing sent to a server.
Why use this tool
Version 4, RFC-compliant
Standard random UUIDs that work as primary keys, request IDs and more.
Bulk generation
Create dozens of UUIDs at once and copy them all in one click.
Secure randomness
Backed by the browser's crypto random generator for genuine uniqueness.
How to use it
Choose how many
Generate one UUID or a batch of them.
Generate
New random v4 UUIDs appear instantly.
Copy and use
Copy a single UUID or the whole list.
Frequently asked questions
What is a version-4 UUID?+
A version-4 UUID is a 128-bit identifier generated from random numbers, formatted as 36 characters like 3f2504e0-4f89-41d3-9a0c-0305e82c3301. It's the most common type for unique IDs.
Are these UUIDs really unique?+
The chance of a collision is astronomically small — you would need to generate billions of UUIDs before a duplicate became remotely likely.
Is anything sent to a server?+
No. UUIDs are generated in your browser and never transmitted.
Can I generate many at once?+
Yes. Set the count and generate a batch, then copy them all together.