UUID Generator

Generate random UUID v4 identifiers. Paste your input, choose an option and copy the result. It runs in your browser, so your text is never uploaded.

Result

What UUID Generator does

Generate random UUID v4 identifiers. Set any options, click the button and a fresh random result is generated in your browser.

UUID Generator has one mode: Generate 5 UUIDs.

How to use UUID Generator

Open UUID Generator.
Choose the mode you want.
Click Generate 5 UUIDs.
Copy the result with one click.

About UUID Generator

Good random values are surprisingly hard to produce by hand. People repeat patterns and pick favorites, which is a problem for passwords, test data and fair draws.

This generator uses your browser's secure random source and produces fresh values on every click. Nothing is saved, so each result is yours alone.

UUID Generator FAQ

What is UUID Generator?

UUID Generator is a free online tool. Generate random UUID v4 identifiers. Set any options, click the button and a fresh random result is generated in your browser.

How do I use UUID Generator?

Open UUID Generator. Choose the mode you want. Click Generate 5 UUIDs. Copy the result with one click.

Is UUID Generator free to use?

Yes. It is completely free, with no usage limits, watermarks or paid tiers.

Do I need to sign up or install anything?

No. Open the page and start using it. There is no account, download or browser extension.

Is my data safe when I use UUID Generator?

Yes. Values are generated on your device and are never sent or stored, so no one else sees them.

What options does UUID Generator include?

UUID Generator has one mode: Generate 5 UUIDs.

Does UUID Generator work on my phone or tablet?

Yes. The layout adapts to any screen size, and the tool works in mobile browsers on iOS and Android.

Which browsers are supported?

Current versions of Chrome, Edge, Firefox and Safari. JavaScript must be enabled.

Can I use the output of UUID Generator commercially?

Yes. The result is yours to use in personal and commercial projects without attribution.

Is there a limit on how much I can enter?

There is no fixed limit. Very large inputs depend on your device's memory and may feel slower on older phones.

How do I copy the result?

Click the Copy button above the Result box. For tools that transform text, Use as input moves the result back to the input so you can apply another change.

Can I use UUID Generator offline?

After the page has loaded, yes. Processing happens in your browser, so the tool keeps working even if your connection drops.

Why do I see an error or an empty result?

An error means one of the settings is out of range, for example a minimum above the maximum. Adjust the fields above the result box and try again.

How reliable are the results from UUID Generator?

Where the browser supports it, randomness comes from the Web Crypto API (crypto.getRandomValues), the same source used for security features.

Can UUID Generator handle many items at once?

Yes. Most generators return several values at once, and you can generate again for a new set.

Where is UUID Generator useful in real work?

Creating test data and placeholder values; Generating IDs and secure passwords; Making quick, unbiased decisions; Picking winners, turns or examples.

Which tools are related to UUID Generator?

You may also like Strong Password Generator, Random Number Generator, Random Letter Generator, Random Choice Generator. All of them are free and work in the same way.

Is the result truly random?

It is generated with the Web Crypto API, which is designed to be unpredictable and is suitable for security uses. It is not predictable from earlier results.

Are my results stored or logged?

No. Values are created in your browser and never leave your device.

Can UUID Generator give the same result twice?

Yes, by chance. A repeat is normal for small ranges, such as a yes or no pick, and extremely unlikely for long values such as UUIDs or passwords.

Is UUID Generator suitable for security-sensitive use?

For passwords and identifiers, yes, because the source is cryptographically secure. For anything high stakes such as financial or legal draws, use a process that is independently verifiable.

What is a version 4 UUID?

A UUID v4 is a 128-bit identifier built from random numbers, written as 32 hexadecimal digits in five groups, such as 123e4567-e89b-42d3-a456-426614174000.

Can two UUIDs ever be the same?

In theory yes, in practice no. The chance of a collision is so small that UUID v4 is widely used for database keys.

How can I report a problem or suggest a tool?

Use the contact link in the footer. Bug reports and tool ideas are welcome, and popular requests are added regularly.