UUID Generator

Generate RFC 4122 version 4 UUIDs in the browser. Each UUID is 128-bit and suitable for unique identifiers in apps and databases.

UUID Generator tool

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How to use

  1. Generate a UUID

    The tool shows one UUID by default. Click Regenerate to create a new one.

  2. Copy to clipboard

    Use the Copy button to copy the current UUID for use in your code or database.

Examples

  • Example UUID

    A typical UUID v4 looks like this.

    Output
    a1b2c3d4-e5f6-4789-a012-3456789abcde

Frequently asked questions

Are these UUIDs cryptographically random?
Yes. The generator uses the Web Crypto API (crypto.randomUUID) when available, which provides cryptographically strong random values.
Can I use these in production?
Yes. UUID v4 is widely used for primary keys, request IDs, and distributed systems. They are safe to use in production.

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