Free UUID/GUID Generator & Validator

Generate and validate Universally Unique Identifiers instantly with one click.

No data stored. 100% client-side.

Generate UUID

UUID / GUID Generator

UUID / GUID Validator

Key Features

Instant Generation

Generate UUIDs instantly in your browser with one click.

Multiple Versions Supported

Support for v1, v4, and v5 UUIDs.

Offline & Secure

All generation and validation is client-side — no data leaves your browser.

Developer-Friendly

Copy, export, validate, and integrate UUIDs quickly.

How It Works

  1. Choose UUID type (v1, v4, v5) or paste an existing UUID to validate
  2. Click Generate or Validate
  3. Copy, export, or use the UUIDs in your app

Quick example using modern browsers:

const id = crypto.randomUUID(); console.log(id);

Frequently Asked Questions

What is a UUID?
A UUID (Universally Unique Identifier) is a 128-bit number used to uniquely identify information in computer systems. Often represented in hexadecimal groups like 550e8400-e29b-41d4-a716-446655440000.
How is a GUID different from a UUID?
GUID is Microsoft's implementation name for UUID. They are functionally the same.
Is this generator secure?
Yes — generation is client-side. For v4 we use secure randomness (crypto.randomUUID or Web Crypto fallback).
Does this tool validate UUIDs?
Yes — the validator runs in your browser and checks UUID format and version (v1, v4, v5). Paste a UUID to confirm structure and version bits instantly.
Can I use UUIDs in databases?
Absolutely. UUIDs are commonly used as primary keys in distributed systems and databases.
What are UUID versions 1, 4, and 5?
v1: timestamp + node identifier; v4: random; v5: namespace + name (SHA-1 based). Different tradeoffs apply.

About UUIDs

UUIDs (Universally Unique Identifiers) are 128-bit values used to uniquely identify information in distributed systems, databases and APIs. They avoid central coordination and are perfect for generating safe unique keys client-side. This site also provides validation to confirm UUIDs are well-formed and to identify their version.

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