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UUID generator

Generate cryptographically random v4 UUIDs in bulk. Uses the native crypto.randomUUID() API. Supports uppercase, no-dash formats.

  • 100% free
  • No sign-up
  • No limits
  • Instant results
Count
uuids
a1ec30e7-7dc9-475c-b430-2a2a823e4a95
4712ed74-c871-4e7e-a1cc-e1dd83b471c9
6ea66e56-5dfa-4607-8d28-865af1995fc3
dde7f6c6-d467-4da8-8cea-24cce23a4e66
669ef821-5359-456b-9896-4207da71ef9f
What this tool does
  • Crypto-random v4 UUIDs
  • Generate up to 100 at once
  • Uppercase & no-dash options
  • Click any UUID to copy
  • 100% browser — no server
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The short version

What is UUID Generator?

A UUID (Universally Unique Identifier) is a 128-bit identifier standardized by RFC 4122 that is guaranteed to be unique across space and time.

Version 4 UUIDs are generated using cryptographically secure random numbers, making them ideal for database primary keys, session tokens, API request IDs, distributed system identifiers, and file naming. Our free UUID generator uses the browser's native crypto.randomUUID() API to produce truly random v4 UUIDs without any server-side processing. You can generate up to 100 UUIDs at once, format them in uppercase or without dashes for compatibility with different systems, and copy individual or all UUIDs with a single click. Whether you are building microservices, designing database schemas, or need unique identifiers for testing, this tool provides instant, cryptographically random UUIDs directly in your browser.

Step by step

How to use UUID Generator

  1. 1

    Set your count and format

    Choose how many UUIDs to generate (1-100) and toggle uppercase or no-dash formatting to match your system requirements.

  2. 2

    Generate UUIDs

    Click the Generate button to create a fresh batch of cryptographically random v4 UUIDs instantly in your browser.

  3. 3

    Copy and use

    Click any individual UUID to copy it, or use the Copy All button to grab the entire batch for pasting into your code, database, or configuration files.

What's inside

Everything this tool
does for you

  • Cryptographically secure v4 UUIDs using crypto.randomUUID()
  • Bulk generation of up to 100 UUIDs at once
  • Uppercase formatting for systems requiring capital hex characters
  • No-dash format for compact storage and URL-safe identifiers
  • One-click copy for individual UUIDs or the entire batch
  • Runs entirely in your browser with zero server requests
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