Generate universally unique identifiers (UUIDs) with support for different versions and bulk generation.
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UUID (Universally Unique Identifier) is a 128-bit identifier that is unique across space and time.
Version 1: Time-based with MAC address. Good for sorting and uniqueness.
Version 4: Randomly generated. Most commonly used and recommended.
Version 5: Name-based using SHA-1 hash. Deterministic and reproducible.
Support for UUID v1, v4, and v5 with different use cases
Generate multiple UUIDs at once for batch processing
Standard, compact, braces, and URN formats
One-click copy individual or all UUIDs
Download generated UUIDs as text files
All generation happens locally in your browser
UUID v1 is time-based and includes MAC address, v4 is randomly generated, and v5 is name-based using SHA-1 hash. V4 is most commonly used for general purposes.
While theoretically possible, the probability of generating duplicate UUIDs is extremely low. With 2^122 possible combinations for v4, you'd need to generate billions per second for billions of years to see a collision.
Use UUID v5 when you need deterministic, reproducible UUIDs based on a namespace and name. Useful for generating consistent IDs for the same input data.
Yes! All UUID generation happens locally in your browser. No data is sent to any server, ensuring complete privacy and security.
Start using our comprehensive UUID generator. Support for multiple versions, formats, and bulk generation.