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GENERATORS

UUID / GUID v4 Generator

Free online RFC 4122 Version 4 UUID and GUID generator. Generate bulk cryptographically secure unique identifiers with custom formatting.

100% Client-Side Fast Private & Secure Free In-Browser Tool All Tools
About UUID Generator

What is UUID / GUID v4 Generator & How Does It Work?

Generate cryptographically strong Universally Unique Identifiers (UUID Version 4) adhering to RFC 4122 specifications. Perfect for database primary keys, distributed tracking IDs, microservice request tracing, and mock datasets.

100% Privacy & Security Guarantee

All operations execute locally inside your browser engine using JavaScript. Your confidential code, JSON datasets, tokens, and credentials are never stored, logged, or transmitted across external servers.

Key Features & Capabilities

Compliant with RFC 4122 Version 4 pseudo-random UUID standard
Bulk generation options: generate 1, 5, 10, 25, 50, or 100 UUIDs at once
Customization toggles: Uppercase characters, hyphen removal, and curly braces `{}` wrapper
Direct "Download TXT" button for exporting generated IDs to text files
Powered by browser CSPRNG (`crypto.getRandomValues`) for genuine randomness

How to Use UUID / GUID v4 Generator (Step-by-Step Guide)

1
Select Quantity

Choose how many UUIDs you want to generate (from 1 to 100).

2
Set Format Options

Toggle options for hyphens, uppercase casing, or surrounding braces.

3
Generate IDs

Click "Generate UUIDs" to produce fresh random identifiers.

4
Copy or Download

Click "Copy All" to copy to clipboard or "Download .TXT" to save as a file.

Frequently Asked Questions

The probability is virtually zero (approximately 1 in 2.71 quintillion for billion generated UUIDs), making them safe for globally unique database keys.

GUID (Globally Unique Identifier) is Microsoft's term for standard RFC 4122 UUIDs. They follow identical structure and bit layout.
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