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Random GUID Generator

Generate unique identifiers for databases and applications instantly.

What is the Random GUID Generator?

A GUID (also called a UUID) is a 128-bit identifier written as 32 hexadecimal characters, usually grouped 8-4-4-4-12 with hyphens. Its job is uniqueness: a version 4 GUID fills 122 of those bits at random, so the chance of two ever colliding is vanishingly small, even across separate machines with no coordination.

This generator makes version 4 (random) or version 1 (time-based) GUIDs and lets you toggle uppercase, surrounding braces and hyphens. They are built in your browser with JavaScript's Math.random() - great for IDs and keys, but not a source of secure secrets, so use the password or secret-key generator for those.

How to use the random GUID generator

  • 1. Set how many GUIDs you want (1-100) and choose version 4 or version 1.
  • 2. Toggle Uppercase, Braces and Hyphens to match the format you need.
  • 3. Click Generate GUIDs.
  • 4. Use Copy to Clipboard to grab the list, or Reset to start over.

Features

  • Version 4 (random) and version 1 (time-based) formats.
  • Generate 1 to 100 identifiers at once.
  • Options for uppercase, braces and hyphens.
  • Standard 8-4-4-4-12 layout, 128 bits.
  • Runs in your browser - nothing is uploaded.

Common uses

Giving database rows a primary key that does not depend on a sequence, tagging records in a distributed system, naming files or resources uniquely, generating correlation IDs for logs, or seeding test data. GUIDs shine where independent systems must mint IDs without talking to each other.

FAQ

What is the difference between version 4 and version 1?

Version 4 is filled mostly with random bits, while version 1 is based on the time and a node value. Version 4 is the common default when you just need a unique, unguessable-looking ID.

Are these GUIDs safe to use as security tokens?

No. They are generated with Math.random(), which is pseudo-random and predictable. Use them as identifiers, not secrets; for secure tokens use the password or secret-key generator.

How unique are random GUIDs?

A version 4 GUID has 122 random bits, so collisions are astronomically unlikely in practice, which is why they work without any central coordination.

Is anything uploaded?

No. The identifiers are generated in your browser with JavaScript and never sent to our server.

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