Free UUID Generator
Generate version 4 UUIDs, one at a time or a thousand in a batch. Format them for code, copy them in a tap, or download the list. Every value comes from your browser's cryptographic random source, and nothing is uploaded.
Your 0 UUIDs
Generating your first batch...
UUIDs are identifiers, not secrets. For API keys or passwords, use a value made for secrets instead.
A fresh batch in four steps.
Set the quantity, pick a format, regenerate whenever you like, then copy or download the lot. The first batch is ready before you touch anything.
Choose how many
Set the quantity, from a single UUID up to 1000 in one batch. A first batch is already waiting when the page loads.
Set the format
Switch to UPPERCASE, strip the hyphens, or wrap each UUID in double quotes with a trailing comma, ready to paste into code or a JSON array.
Regenerate any time
One tap on Regenerate gives you a completely fresh batch. Every UUID comes from your browser’s cryptographic random number generator.
Copy or download
Copy a single UUID from its row, copy the whole batch in one go, or download the list as a .txt or .csv file.
Proper UUIDs, with the bits set right.
Plenty of generators fake it with weak randomness. This one uses the browser crypto API and sets the version and variant bits exactly as the standard says.
Real version 4 UUIDs
Generated with the crypto.randomUUID API, with a careful fallback that sets the version and variant bits exactly as RFC 4122 requires. Not a lookalike built on Math.random.
Bulk generation
Need one UUID or a thousand? Set the quantity and get the whole batch at once, handy for seeding test data, fixtures and spreadsheets.
Code-ready formatting
UPPERCASE for systems that expect it, hyphen-free for compact keys, or quoted with trailing commas so the list drops straight into an array literal.
Private by design
Every UUID is generated in your browser. Nothing is requested from a server and nothing you generate is sent or stored anywhere.
IDs that fit your system.
A batch of UUIDs gets you through today. But if your product needs its own identifier scheme, order numbers, SKU codes, keys that stay unique across tenants or IDs that sort by time, that logic belongs inside your own software. That is the kind of backend, data and integration work we build at Techliphant, shaped around how your business actually runs.
Need a secret instead of an identifier? Try the password generator.
Common questions.
A UUID (universally unique identifier) is a 128-bit value written as 32 hexadecimal characters in five groups, like 3f2b8a1c-9d4e-4f6a-b2c1-7e8d9a0b1c2d. The format is standardised in RFC 4122. Because the value space is astronomically large, two systems can create IDs independently without coordinating and still avoid clashes.
Nothing in practice. GUID (globally unique identifier) is the name Microsoft uses for the same 128-bit format, so you will see it in Windows, .NET and SQL Server documentation. A GUID generator and a UUID generator produce the same thing, and this tool works for both.
The version tells you how the UUID was made. Version 4 means almost all of it is random: 122 of the 128 bits come from a random number generator, and the remaining 6 bits mark the version and variant. That is why the third group always starts with a 4 and the fourth group starts with 8, 9, a or b.
In theory yes, in practice no. There are about 5.3 undecillion possible version 4 UUIDs, a 5 followed by 36 zeros. You would need to generate roughly a billion UUIDs every second for about 85 years before the odds of a single duplicate reached fifty-fifty. For any real system, you can treat them as unique.
Version 1 builds the UUID from a timestamp and a MAC address, which makes it sortable by time but can leak when and where it was made. Version 7 is newer and combines a timestamp with random bits, so it sorts by creation time without exposing hardware details. Version 4 is pure randomness, which makes it the safest default when you do not need time ordering.
The random bits come from your browser’s crypto API (crypto.randomUUID, or crypto.getRandomValues in the fallback), which is a cryptographically strong source. That said, a UUID is an identifier, not a secret. For API keys, tokens or passwords, use a value designed for secrets, such as one from our password generator.
Yes, and many systems do, especially when records are created on different machines that cannot share a counter. The trade-off is that random v4 keys insert in no particular order, which can fragment indexes on very write-heavy tables. If that matters, version 7 or a database-native sequential type is worth a look.
No. The whole tool runs in your browser using JavaScript. No request is made to a server to generate the values, and nothing you generate, copy or download leaves your device.
Yes. A quick batch of UUIDs is handy, but if your product needs its own ID scheme, order numbers, SKU codes, tenant-safe keys or IDs that sort by time, that logic belongs inside your own software. That is the kind of backend and data work we do at Techliphant.
Private by design: this generator runs entirely in your browser, so every UUID is created on your own device and nothing is sent anywhere or stored. It is provided free for development, testing and everyday use.
Ready when you are
Let's build something exceptional.
Tell us about your business, your stack, and the problem you are trying to solve. We respond with a clear next step usually a 30-minute discovery call, no fluff.