UUID Generator

Generate random UUID v4 values instantly in your browser. Create single or multiple UUIDs and copy them in plain text, JSON, CSV, JavaScript, or SQL format.

Browser-only

How to read UUIDs

Use this when you want to generate browser-only UUID v4 values for test data or temporary IDs.

Example

550e8400-e29b-41d4-a716-446655440000
Read the UUID generator guide

Generate UUIDs

UUID v4 is generated entirely in the browser. Adjust the settings, then generate your values.

Output format
Letter case

Generated output

Copy the full output or download it as a file.

Generated UUIDs will appear here.

Plain text

Guide

A UUID is a 128-bit identifier used to identify resources. UUID v4 is random, so it can be generated directly in the browser.

Common uses include database IDs, API resource IDs, event IDs, log IDs, test data, and distributed systems.

What is a UUID?

UUID stands for Universally Unique Identifier. It is a 128-bit identifier commonly used to uniquely identify resources in software systems.

  • Database IDs
  • API resource IDs
  • Event IDs
  • Log IDs
  • Test data
  • Distributed systems

What is UUID v4?

UUID v4 is a randomly generated UUID. It does not depend on time, a MAC address, or user information, which makes it easy to generate in the browser.

Can UUIDs collide?

UUID v4 values are randomly generated from a very large space. When you use a secure random number generator, collisions are extremely unlikely. UUIDs are still not a substitute for database uniqueness constraints.

Even though UUID collisions are extremely unlikely, you should still use unique constraints in your database when UUIDs are used as primary keys or unique identifiers.

UUID vs password

UUIDs are not passwords. UUIDs are usually used as identifiers, while passwords and secrets are used for authentication and authorization.

  • Passwords
  • API keys
  • JWT secrets
  • Webhook secrets
  • Session secrets
  • NextAuth secrets

Use a dedicated secret generator for those use cases.

Note

UUIDs are designed to identify resources, not to protect secrets. Do not use UUIDs as passwords, API keys, or authentication tokens.

FAQ

Are UUIDs generated on the server?

No. Generation stays in your browser, and nothing is sent to a backend server.

Can I generate multiple UUIDs?

Yes. Set a count and generate as many as you need, up to 1000.

Can I use UUIDs as passwords?

No. UUIDs are identifiers, not secrets. Use a dedicated secret generator for authentication-related values.

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Safety

Browser-only

Generation and export both stay in the browser.

No upload

Your input is never sent to a server.

No storage

Reloading clears the input and output.