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Developer

UUID Generator

Generate cryptographically secure Version 4 UUIDs instantly in your browser.

Configuration

Adjust formatting and quantity options.

Max 500 at a time

v4 UUIDs (0)

How to use the UUID Generator

Developers often need bulk UUIDs for seeding databases, testing APIs, or creating unique mock data. Our generator provides a fast, client-side solution that scales instantly up to 500 records at a time.

  • 1Set the Quantity: Use the slider or the number input to specify how many UUIDs you need generated (maximum of 500 per batch).
  • 2Adjust Formatting: Toggle the formatting checkboxes if your system requires uppercase letters or no hyphens (e.g. standard 32-character hex strings).
  • 3Copy the Batch: Click "Copy All" in the corner of the output window to instantly copy the entire list separated by line breaks.

Frequently Asked Questions

What is a UUID?
A Universally Unique Identifier (UUID) is a 128-bit label used for information in computer systems. When generated according to the standard methods, UUIDs are, for practical purposes, unique. Their uniqueness does not depend on a central registration authority.
What is a Version 4 UUID?
A Version 4 UUID is generated using completely random numbers. The Web Crypto API used by this tool ensures that the random numbers are cryptographically secure, meaning the probability of a collision (generating the same UUID twice) is infinitesimally small.
Are my UUIDs generated securely?
Yes! Your UUIDs are generated entirely within your browser utilizing the native `window.crypto.randomUUID()` method. No network requests are made, and your UUIDs are never tracked, logged, or sent to a server.
What is the difference between UUID and GUID?
There is practically no difference. GUID (Globally Unique Identifier) is simply Microsoft's implementation and terminology for the UUID standard. Our generated identifiers are fully compatible with systems expecting either UUIDs or GUIDs.

API transparency

This tool utilizes your browser's native Web Crypto API (`window.crypto.randomUUID()`) to generate high-performance, collision-resistant UUIDs locally.

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