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Ubify Security & Compliance Operations
CYBERSECURITY & PRIVACY AUDITORS
About This Tool
The Secure UUID Generator generates RFC 4122 compliant version 4 Universally Unique Identifiers (UUIDs) and Globally Unique Identifiers (GUIDs) using your browser's native cryptographic entropy source.
### Cryptographic Generation & Version 4 Specification The generator relies directly on the modern Web Cryptography API: - Native CSPRNG Entropy: Calls `crypto.randomUUID()` to obtain 128-bit cryptographically secure pseudorandom numbers derived directly from operating system entropy pools. - RFC 4122 Variant & Version Bits: Generates 36-character hexadecimal strings structured as `8-4-4-4-12` characters (`xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx`), where the 13th character is always `4` and the 17th character is restricted to variant bits `8`, `9`, `a`, or `b`. - Bulk Batch Generation: Allows generating between 1 and 100 unique identifiers simultaneously with a single click.
### Collision Probability Mathematics A version 4 UUID contains 122 bits of true entropy ($2^{122} \approx 5.3 \times 10^{36}$ possible unique values). Generating 1 billion UUIDs per second for 100 years carries a collision probability below 1 in a billion, making them universally suitable for database primary keys, session tokens, and distributed messaging IDs.
### Worked Generation Example - Requested Identifier Count: 3 - Generated Sample Identifiers: - `f47ac10b-58cc-4372-a567-0e02b2c3d479` - `9b1deb4d-3b7d-4bad-9bdd-2b0d7b3dcb6d` - `1b9d6bcd-bbfd-4b2d-9b5d-ab8dfbbd4bed`
### 100% Client-Side Privacy Unlike web-based UUID generators that fetch identifiers from remote backend APIs, all UUIDs generated here originate entirely within your local browser's crypto engine with zero network transit.
How to Use
- 1
Specify the number of UUIDs you wish to generate (between 1 and 100).
- 2
Click the "Generate" button to produce fresh cryptographic tokens.
- 3
Review the formatted list of RFC 4122 version 4 UUID strings.
- 4
Copy the generated identifiers directly into your code, database seeds, or test fixtures.
Frequently Asked Questions
Are these UUIDs generated using a secure random number generator?
Yes. They are generated via crypto.randomUUID(), which interfaces directly with your operating system cryptographic entropy source rather than standard Math.random().
What is the format of an RFC 4122 version 4 UUID?
It is a 36-character string containing 32 hexadecimal digits separated by 4 hyphens into five groups (8-4-4-4-12).
Can anyone else see the UUIDs generated on this page?
No. UUID generation happens purely within your device browser memory without network queries.