UtilToolkits

UUID Generator (v4)

About this Tool

Generate cryptographically strong, random Version 4 UUIDs (Universally Unique Identifiers) with a single click. This tool is essential for developers and database administrators who need guaranteed unique IDs for records, sessions, or distributed systems. No libraries, no commands—just instant, secure UUIDs.

This tool uses the browser's built-in `crypto.randomUUID()` method, which generates a 128-bit random UUID according to the RFC 4122 standard. This is the most secure and modern way to create UUIDs on the web.

  1. Click the 'Generate UUID' button.
  2. A new, random UUID will appear instantly.
  3. Click the 'Copy' button to copy it to your clipboard.
  • Assigning a unique primary key to a new database record.
  • Generating a secure session ID for a user.
  • Creating a unique identifier for a transaction in a distributed system.
  • Cryptographically Strong: Generates secure, random UUIDs (v4).
  • Browser-Native Security: Uses the Web Crypto API for maximum security.
  • One-Click Generation: Instantly create and copy a new UUID.
  • No Collisions: The probability of a duplicate is practically zero.

A Version 4 UUID is a 128-bit number that is generated randomly. The sheer number of possible combinations (2^122) makes the probability of two randomly generated UUIDs being the same virtually zero, making them ideal for decentralized systems.

Is a v4 UUID truly unique?

For all practical purposes, yes. The chance of generating a duplicate is astronomically low.

Can I generate more than one?

Yes, just keep clicking the 'Generate UUID' button for as many as you need.

What about other UUID versions?

This tool focuses on Version 4, which is the most common and recommended version for generating random IDs. Other versions, like v1, are based on timestamps.

All calculations and data processing for this tool are performed locally in your browser. We do not send any of your data to our servers, ensuring your information remains private and secure.

Credits:Next.js•React•Tailwind CSS•Lucide Icons

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