UUID v4 Generator

UUID v4 Generator Online

UUID (Universally Unique Identifier) is a standard 128-bit identifier represented as 32 hexadecimal digits separated by hyphens: xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx. Version 4 is randomly generated using a cryptographically secure source (random_bytes() in PHP).

Common Uses of UUID

• unique record identifiers in databases;
• temporary file and directory names;
• session keys and access tokens;
• event identifiers in distributed systems.

The probability of two random UUID v4 values colliding is negligibly small — on the order of 10⁻³⁷ even when generating a billion UUIDs per second for a hundred years.

Frequently Asked Questions

• How to generate multiple UUIDs at once?

  On the tool page, there is a field for entering the quantity. You can specify any value from 1 to 25. After clicking the "Generate" button, you will receive a list of unique identifiers. Each of them will strictly comply with the UUID v4 standard.

• Is it safe to generate UUIDs through this online tool?

  Yes, absolutely safe. Generation occurs exclusively on your device using JavaScript. The generated UUIDs are not transmitted to the 101ip.ru server and are not stored. This guarantees the confidentiality of your data.

• What if I need to use a UUID in program code?

  You can simply copy the obtained values and paste them into your code. Our tool is also useful for manual API testing when you need to send a request with a valid unique identifier. For automation, use the built-in libraries of your programming language.