What UUID versions does this generator support?

Version 1 (time-based, includes timestamp and MAC address), Version 4 (randomly generated — the most widely used), and Version 5 (namespace + name hashed with SHA-1). v4 is recommended for most use cases.

Are the UUIDs cryptographically random?

v4 UUIDs are generated using the browser's window.crypto API, which produces cryptographically secure random values — not predictable pseudo-random numbers. They are safe for use as unique identifiers.

Can I generate UUIDs in bulk?

Yes. Set the quantity (up to 1,000) to generate a list of unique UUIDs at once. Copy all to clipboard or download as a text file.

Does UUID Generator log or store the data I paste into it?

No. UUID Generator processes everything locally in your browser. Nothing is sent to a server, logged, or stored. Your code, secrets, and data never leave your machine.

Which browsers are compatible with UUID Generator?

UUID Generator works in all modern evergreen browsers: Chrome 90+, Firefox 88+, Edge 90+, and Safari 14+. Internet Explorer is not supported.

Can I customise the output from UUID Generator?

Yes. All generated output is plain text or HTML that you can copy and edit in any text editor. Adjust wording, add details, or reformat as needed.

Is UUID Generator free to use?

Yes, UUID Generator is 100% free with no usage limits, no watermarks, and no hidden charges. The platform is supported by non-intrusive advertising so all tools stay free for everyone.

Do I need to create an account to use UUID Generator?

No account or registration is required. Open UUID Generator and start immediately — no email, no sign-up, no personal information needed.

Is my data safe when using UUID Generator?

Yes. UUID Generator runs entirely in your browser using client-side JavaScript. Your files and data never leave your device and are never transmitted to our servers.

Does UUID Generator work on mobile and tablet devices?

Yes. UUID Generator is fully responsive and tested on smartphones, tablets, and all major desktop browsers (Chrome, Firefox, Safari, and Edge). The interface adapts automatically to any screen size.

UUID Generator

TRENDING

Generate random UUIDs and GUIDs

FreeNo sign-upDeveloper Tools →

UUID Generator is a free, browser-based web development and coding tool. Generate Version 1, 4, and 5 UUIDs (GUIDs). Generate single or bulk UUIDs for database primary keys and unique identifiers.

Web developers, software engineers, and DevOps professionals use UUID Generator every day to save time and skip the overhead of desktop software or paid services. No installation, no account, and no technical knowledge required — just fill in the form for UUID Generator and get results in seconds. Your files never leave your browser — full privacy by design.

UUID Generator

● Live

Version

Count (1–50)

UppercaseNo dashes

v4 — Random UUID (recommended for most use cases)

v1 — Time-based UUID (approximate, no MAC address)

nil — All zeros UUID (useful as placeholder)

How to use UUID Generator

Choose version

Select UUID version (v1, v4, or v5).

Set quantity

Choose how many UUIDs to generate.

Generate

Click generate to create UUIDs.

Copy

Copy individual or all UUIDs.

Use Cases

Debugging and validating data formats during API development
Preparing test fixtures and sample payloads
Encoding and decoding data for integrations and authentication flows
Formatting and linting configuration files before deployment

Key Benefits

100% free with no usage limits, watermarks, or hidden fees
No account or sign-up required — use it instantly
Works in all modern browsers on desktop, tablet, and mobile
Privacy-first: all processing runs locally, files never leave your device
Professional, print-ready output in seconds
Fully customisable fields to match your requirements
Download as PDF or copy directly to clipboard

UUID Generator

How to use UUID Generator

Choose version

Set quantity

Generate

Copy

Use Cases

Key Benefits

Frequently Asked Questions

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