About UUID Version 4 & Universally Unique Identifiers

UUID v4 relies on 122 bits of pseudo-random entropy generated via `crypto.getRandomValues()`. Collision probability is virtually 0 (1 in 2^122).

Conforms strictly to RFC 4122 specs: 36 characters including 4 hyphens, with version bit 4 (`0100`) and variant bits (`10xx`).

Generated instantly on your computer. Generated UUIDs and secret keys are never transmitted over the internet or logged on servers.

Frequently Asked Questions

UUID v4 is a 128-bit universally unique identifier generated using cryptographically secure random numbers, virtually eliminating collision risk.

Yes! Select the quantity slider to generate anywhere from 1 to 100 unique UUIDs simultaneously.

UUID v4 & Secret Key Generator

Free Tool

Generate cryptographically random UUID v4 / GUIDs online in bulk (up to 100). Customizable uppercase, lowercase, hyphens, and braces.

Instant 0ms 100% Client-Side

RFC 4122 Standard Compliant

UUID & GUID v4 Generator

Generate cryptographically secure Version 4 UUIDs (Universally Unique Identifiers) in bulk directly in your browser using high-entropy CSPRNG.

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Formatting

Hyphens (-) Braces { }

UUID v4 relies on 122 bits of pseudo-random entropy generated via `crypto.getRandomValues()`. Collision probability is virtually 0 (1 in 2^122).

Conforms strictly to RFC 4122 specs: 36 characters including 4 hyphens, with version bit 4 (`0100`) and variant bits (`10xx`).

Generated instantly on your computer. Generated UUIDs and secret keys are never transmitted over the internet or logged on servers.

UUID v4 is a 128-bit universally unique identifier generated using cryptographically secure random numbers, virtually eliminating collision risk.

Yes! Select the quantity slider to generate anywhere from 1 to 100 unique UUIDs simultaneously.