UUID - GUID Generator

Instant UUID & GUID Generator

Generate cryptographically secure Version 4 UUIDs. Simple, fast, and reliable for all your development needs.

Generate UUIDs

Online UUID/GUID Generator

Create one or multiple unique identifiers with a single click. Fast, secure, and client-side.

UUID/GUID Generator

How many UUIDs to generate?

Generated UUID(s)

Why Use Our UUID Generator?

Our tool provides a premium experience for generating the unique IDs you need for any project.

Secure Generation

Uses the browser's native Crypto API to generate cryptographically strong V4 UUIDs.

Bulk Creation

Effortlessly generate up to 100 unique identifiers at once, saving you time and clicks.

One-Click Copy

Instantly copy one or all generated UUIDs to your clipboard with a single convenient button.

How It Works

Generating unique IDs is simple with our straightforward process.

Set Amount

Enter the desired number of UUIDs you want to create into the input box.

Click Generate

Press the large 'Generate' button to instantly create your unique identifiers.

Copy IDs

Your UUIDs will appear in the text area, ready to be copied to your clipboard for use.

The Ultimate Guide to Understanding UUIDs

Unlock the secrets of unique identifiers. Learn what UUIDs are, why they are essential for modern software, and how to use them effectively.

What is a UUID?

A UUID (Universally Unique Identifier) is a 128-bit label used for information in computer systems. When generated according to the standard methods, UUIDs are, for all practical purposes, unique. Their uniqueness does not depend on a central registration authority or coordination between the parties generating them, unlike most other numbering schemes.

While the term GUID (Globally Unique Identifier) is also used, particularly in Microsoft's ecosystem, it is functionally synonymous with UUID. A UUID is represented as a 32-digit hexadecimal string, typically displayed in five groups separated by hyphens, like this: 123e4567-e89b-12d3-a456-426614174000.

Understanding UUID Versions

There are several versions of UUIDs, each with a different generation strategy. The most common ones are:

• Version 1 (Time-based): Generated using a combination of the computer's MAC address and the current timestamp. They are not random and can reveal information about the generating computer and time.
• Version 4 (Random): Generated from random or pseudo-random numbers. This is the most common version used today as it doesn't leak any identifying information. Our tool generates Version 4 UUIDs using a cryptographically secure random number source.
• Version 5 (Name-based, SHA-1): Generated by hashing a "namespace" and a "name" together using the SHA-1 algorithm. This means the same input name in the same namespace will always produce the same UUID.

Why are UUIDs so Important in Development?

UUIDs solve a fundamental problem in distributed systems: how to create unique identifiers for things without needing to coordinate with a central source. This makes them invaluable in many scenarios:

• Database Primary Keys: Using UUIDs as primary keys allows you to generate new records in different databases (e.g., on a user's device and on a server) and then merge them later without key collisions. This is a massive benefit for applications that need to work offline.
• Transaction IDs: Every request or transaction in a system can be assigned a unique UUID, making it easy to track, log, and debug processes as they flow through different microservices.
• Resource Naming: When creating resources like files, user accounts, or API objects, a UUID guarantees a unique name that won't clash with anything else.
• Security: Using sequential integer IDs (e.g., `user/1`, `user/2`) can be a security risk, as it allows attackers to guess other valid IDs. Using UUIDs (`user/123e4567-...`) makes this enumeration impossible.

How Our Secure Generator Works

Trust and security are paramount when generating identifiers. Our UUID Generator leverages the modern Web Cryptography API, specifically the crypto.randomUUID() method. This function is built directly into modern browsers and is designed to produce cryptographically strong, high-quality random numbers for generating Version 4 UUIDs.

Crucially, the entire process happens on your computer, within your browser. We do not have access to the UUIDs you generate, and nothing is ever sent to our servers. This ensures absolute privacy and speed, making it a safe and efficient tool for any development task.

Frequently Asked Questions

Find answers to common questions about our UUID Generator tool.

What is a UUID / GUID?

A UUID (Universally Unique Identifier), or GUID (Globally Unique Identifier), is a 128-bit number used to uniquely identify information in computer systems. They are designed to be unique across all systems and all time, making them ideal for database keys, transaction IDs, and more.

Is this UUID generator free to use?

Yes, our UUID/GUID Generator is completely free to use for all your needs.

Are the generated UUIDs secure?

Yes. This tool uses the browser's built-in `crypto.randomUUID()` API to generate Version 4 UUIDs, which are cryptographically strong and suitable for most applications requiring random, unique identifiers.

Are the UUIDs I generate stored on your server?

No. All UUIDs are generated locally in your browser (client-side). We do not see, store, or transmit any of the data you generate, ensuring your complete privacy.

How do I use the generator?

Simply enter the number of UUIDs you wish to create in the input box (up to 100) and click the 'Generate' button. The unique IDs will appear in the text area below, ready to be copied.

What version of UUID does this tool generate?

This tool generates Version 4 (V4) UUIDs, which are based on random numbers. This is the most common type of UUID and is ideal for generating identifiers without a dependency on network cards or timestamps.

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