UUID Generator
Generate random UUID v4 identifiers instantly. Create one or up to 100 at once, copy to clipboard or download as a text file.
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Generate random UUID v4 identifiers instantly. Create one or up to 100 at once, copy to clipboard or download as a text file.
A UUID (Universally Unique Identifier) is a 128-bit identifier represented as 32 hexadecimal digits split into five groups: xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx. UUIDs are used across databases, APIs, distributed systems, and file systems to uniquely identify records without needing a central counter or sequence.
UUID v4 is generated using random or pseudo-random numbers. It requires no network access, no time-based component, and no namespace. With 122 bits of randomness, the probability of a collision is about 1 in 5.3 × 1036 — negligible for any practical use.
Yes. The tool uses the browser's native crypto.randomUUID() API, which is backed by a cryptographically secure random number generator (CSPRNG). Nothing is transmitted to any server — all generation happens locally in your browser.
GUID (Globally Unique Identifier) is Microsoft's name for the UUID standard. They follow the same 8-4-4-4-12 format and are completely interchangeable in practice.
Yes, and it is a common pattern. UUIDs prevent sequential ID guessing, simplify merging data from multiple sources, and work well in distributed systems. The trade-off is slightly larger index size and reduced locality compared to auto-increment integers.
Theoretically yes, but the probability is astronomically small. Generating 1 billion UUIDs per second for 85 years would give roughly a 50% chance of a single collision. For any real-world application, you can treat UUID v4 collisions as impossible.