A Universally Unique Identifier (UUID) is a 128-bit label used to uniquely identify information in computer systems without central coordination.

What is the difference between UUID v1 and v4?

UUID v1 is time-based, generated from timestamp and node/clock ID. UUID v4 is fully random, utilizing high-entropy cryptographically secure numbers.

How likely is a UUID v4 collision?

The probability of a collision is mathematically negligible. Generating billions of UUIDs per second for years yields nearly zero chance of duplication.

Does this tool require an internet connection?

No. The generator runs entirely client-side using JavaScript crypto APIs, allowing complete offline use.

Can I use these UUIDs for database primary keys?

Yes. UUIDs are standard for distributed databases where auto-incrementing integers are prone to collision and security leaks.

What is the standard format of a UUID?

A standard UUID consists of 32 hexadecimal characters displayed in 5 groups separated by hyphens (8-4-4-4-12 format).

Is this generator safe to use?

Yes. Generation happens in-browser, ensuring that no keys or UUIDs are sent to our servers or logged.

What are the variants of UUIDs?

Variants are defined in RFC 4122. The most common variant is the DCE 1.1 standard, which our generated UUIDs conform to.

Can I generate v5 UUIDs?

This generator currently supports bulk generation for v4 and v1, which are the most common formats used in development.

Is there a limit on how many I can generate at once?

You can generate up to 500 UUIDs per click to prevent browser rendering lags, with no limit on total generations.

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Bulk UUID Generator

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