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UUID Generator

Generate cryptographically random version 4 UUIDs or time-ordered version 7 UUIDs in bulk, with uppercase, no-hyphen and braces options.

In-browser · no upload

Generated with your browser’s cryptographically secure random number generator.

Runs entirely in your browser. Your files and text are not uploaded to our servers.

To generate a UUID, choose how many (up to 1,000) and the version, then select Generate. Version 4 UUIDs are fully random; version 7 UUIDs start with a timestamp so they sort by creation time, which is better for database primary keys.

How to use the UUID Generator

  1. 1

    Choose quantity and version

  2. 2

    Pick formatting

    Uppercase, no hyphens, {braces}.

  3. 3

    Copy or download

Features

  • Secure randomness

    Web Crypto API.

  • Version 7

    Time-ordered, index-friendly.

  • Bulk

    Up to 1,000 at once.

Examples

v4: 3f2b8c1e-9d4a-4f6b-a2c7-5e8d1b0a9c34
v7: 01923c4e-7a10-7b3c-9e2f-4d5a6b7c8d9e

Privacy and file handling

Where it runs
Runs in your browser

Runs entirely in your browser. Your files and text are not uploaded to our servers.

Frequently asked questions

Can two UUIDs collide?

In practice no: v4 has 122 random bits, making a collision astronomically unlikely.

Should I use v4 or v7?

Use v7 for database keys (better index performance); v4 when you don’t want creation time to be inferable.

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