A UUID (Universally Unique Identifier) is a 128-bit value used to uniquely identify information. This tool generates UUIDs compliant with RFC 4122.

Which UUID versions are supported?

This tool supports v1 (time-based), v3 (name-based MD5), v4 (random), and v5 (name-based SHA-1).

Are UUIDs generated client-side?

Yes. v4 UUIDs use your browser’s Web Crypto API for randomness; v1/v3/v5 are computed in-browser based on your inputs.

Can I generate UUIDs in bulk?

Yes. Choose a quantity and generate multiple UUIDs at once, then copy or export them.

Is the UUID Generator free?

Absolutely. It’s free to use and requires no login.

Free UUID Generator

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Generate RFC 4122 UUIDs (v1, v3, v4, v5) with options for bulk creation, copy-to-clipboard, export, and formatting (hyphens, braces, case). v4 uses secure randomness from your browser.

Features:

Versions: v1 (time), v3 (MD5 name), v4 (random), v5 (SHA-1 name)
Bulk Output: Generate many UUIDs at once
Formatting: Hyphenless, braces, uppercase/lowercase
Namespaces: DNS, URL, or custom for v3/v5
Copy & Export: Copy list or download TXT/CSV/JSON
100% Free: Runs locally in your browser