UUID Generator

The UUID Generator on BetterUtils is free and runs entirely in your browser. Create random UUID v4 and GUID values for databases, APIs, and sessions — copy and paste instantly, no install required.

How to Use the UUID Generator

Follow these three steps with the UUID Generator — each random ID is version 4 (RFC 4122) and safe to paste into code or databases.

UUID Generator — how it works: choose count, generate random UUID v4, copy for databases and APIs
  1. The UUID Generator lets you choose how many UUIDs you want (1–10 at once) with the slider.
  2. Click Generate UUID to create random version 4 UUIDs instantly in your browser.
  3. Click any result card to copy your UUID to the clipboard for PostgreSQL, MongoDB, REST APIs, or file names.

What is a UUID?

UUID stands for Universally Unique Identifier. Our online UUID generator creates 128-bit identifiers used in computer systems. The probability of generating two identical UUIDs is so astronomically low that for all practical purposes, it's zero.

UUID v4 vs GUID

Many developers search for a GUID generator or random UUID generator — both refer to the same RFC 4122 standard. This UUID generator outputs version 4 (fully random) values, also called GUIDs on Windows platforms.

Why Version 4?

There are several versions of UUIDs. Version 4 (which this generator creates) is completely random. Unlike Version 1 (which includes a timestamp and MAC address), Version 4 reveals no information about the time or machine that generated it, making it safer for privacy.

Use Cases

  • Database Primary Keys: Using UUIDs allows you to merge databases without ID conflicts.
  • API Tokens & Session IDs: Unique tokens for tracking user sessions and microservices.
  • Filenames: Ensuring uploaded files don't overwrite each other.
  • JavaScript & Node.js: Paste into crypto.randomUUID() workflows or ORM migrations when you need a quick test ID.

If you just need a simple random number for a game or lottery, our Random Number Generator is simpler and easier to read.

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