Data & Security
UUID & GUID GeneratorUnique identifiers made easy
Generate RFC4122-compliant UUIDs (v1, v3, v4, v5) and GUIDs instantly. Features bulk generation, custom formatting, and validation tools.
Uppercase
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Braces {}
History
Generated Output
Generated 0 UUIDs • Version v4
About UUIDs & Guarantees
Uniqueness Guarantee
While not strictly impossible, the probability of a collision in UUID v4 is so astronomically low that it can be effectively ignored. To put it in perspective, you would need to generate 1 billion UUIDs per second for 85 years to have a 50% chance of a single collision.
Version Differences
- v1Timestamp-based: Uses current time & MAC address.
- v3Namespace (MD5): Deterministic based on input name.
- v4Random: Completely random (most common & recommended).
- v5Namespace (SHA-1): Better deterministic version than v3.