UUID Generator
Generate random version-4 UUIDs in bulk with one click — created in your browser, nothing uploaded.
Version 4 (random) UUIDs, generated with your browser’s crypto.randomUUID() — cryptographically random and never sent anywhere.
How it works
- Choose how many — generate a single UUID or up to fifty at once.
- Click generate — fresh random v4 UUIDs appear instantly.
- Copy one or all — everything is produced on your device.
Private by design
The UUIDs are generated inside your browser with the native crypto.randomUUID() API, so nothing is requested from or sent to any server. A Content-Security-Policy blocks the page from making network calls, and the tool keeps working offline once loaded. Read more in our privacy policy.
Frequently asked questions
Which UUID version does this generate?
Version 4 (random) UUIDs, produced by your browser's built-in crypto.randomUUID(). These are the most common general-purpose UUIDs and are cryptographically random.
Are the UUIDs generated on a server?
No. They're created entirely in your browser. Our pages ship a Content-Security-Policy that blocks any network calls, so nothing about your UUIDs is transmitted.
Are they unique enough to rely on?
Yes. A version-4 UUID has 122 random bits, so the chance of a collision is astronomically small — you can safely use them as database keys, request IDs and file names.
What's the difference between UUID and GUID?
None in practice — GUID (Globally Unique Identifier) is Microsoft's name for the same 128-bit UUID standard. The format is identical.
Is it free?
Completely free, with no sign-up and no limits.
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