IT-tools

UUID generator

Generate UUID v1, v3, v4, v5, or nil values in batches of up to 100. Supports custom namespaces, uppercase output, and one-click copying.

Generated UUIDs
Generate UUIDs to see the result.

// About this tool

Create universally unique identifiers for databases, APIs, or test fixtures. Choose a version, set how many you need, and copy the whole list in one click.

// How to use it

  1. Pick a UUID version and how many to generate.
  2. For v3 or v5, enter the namespace and name.
  3. Generate and copy the identifiers.

// Frequently asked questions

Which UUID version should I use?

Use v4 for random identifiers, or v3/v5 when you need a repeatable value derived from a name.

Are generated UUIDs unique?

v4 values are random and collision risk is negligible; v3 and v5 are deterministic for the same input.

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