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UUID Generator Online — Free Tool

Generate cryptographically secure version 4 Universally Unique Identifiers (UUIDs) instantly.

Settings
Runs locally in your browser (no server).
UUIDs
Click Generate…
Privacy note: All processing happens entirely in your browser. No data is sent to our servers.

About this tool

A UUID (Universally Unique Identifier) is a 128-bit value often displayed as 36 characters with hyphens. Version 4 UUIDs are random and are widely used as database primary keys, correlation IDs, and file names.

This generator creates RFC‑4122 version 4 identifiers using cryptographically strong randomness in your browser. Generate one ID or a batch, then copy the values into your application or test fixtures.

Common use cases

  • Assigning unique IDs in prototypes and seed data
  • Creating correlation IDs for distributed request tracing
  • Generating filenames that avoid collisions in uploads

How to use

  1. Configure the tool using the controls above.
  2. Generate or transform your content.
  3. Copy or download the result.

This page is available at /tools/uuid-generator/.

Related keywords

  • uuid generator
  • uuid v4
  • guid generator
  • random uuid

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FAQ

What is UUID Generator?

UUID Generator is an online privacy tool that generate cryptographically secure version 4 Universally Unique Identifiers (UUIDs) instantly.

How do I use the UUID Generator?

Use the generator controls to create secure values, then copy them into your app, config, or password manager.

Is this tool free?

Yes—this tool is free to use with no account required.

Does it run locally in the browser?

Yes. Calculations and transformations run in your browser—your input stays on your device.