🔑 Free UUID Generator - Generate UUID v1, v4 Online

Generate Universally Unique Identifiers (UUIDs) instantly — perfect for database keys, API tokens, session IDs, or any situation that needs unique identifiers. Our free online UUID generator supports both v1 and v4 UUID formats with real-time generation.

✨ Why Use Our UUID Generator?

• 🚀 Instant Generation - Generate UUIDs in milliseconds
• 🔒 Multiple Formats - Support for UUID v1, v4, and custom formats
• 💾 Bulk Generation - Create multiple UUIDs at once
• 📋 One-Click Copy - Copy generated UUIDs instantly
• 🌐 No Installation - Works in any browser, no downloads needed
• 🔐 Secure & Random - Cryptographically secure random generation

📋 UUID Formats Supported

UUID v1 (Time-based)

• Format: xxxxxxxx-xxxx-1xxx-xxxx-xxxxxxxxxxxx
• Use Case: When you need sortable, time-ordered UUIDs
• Features: Includes timestamp and machine identifier
• Example: 550e8400-e29b-1d4a-7164-446655440000

UUID v4 (Random)

• Format: xxxxxxxx-xxxx-4xxx-xxxx-xxxxxxxxxxxx
• Use Case: Best for unique, non-predictable identifiers
• Features: Completely random generation
• Example: f47ac10b-58cc-4372-a567-0e02b2c3d479

🎯 Common Use Cases

• Database Primary Keys - Unique identifiers for database records
• API Authentication - Generate secure tokens and session IDs
• File Naming - Create unique filenames to avoid conflicts
• Testing & Development - Mock data and test scenarios
• Distributed Systems - Unique IDs across multiple servers
• Mobile Apps - Device identifiers and user sessions

🔧 How It Works

1. Select Format: Choose between UUID v1 or v4
2. Set Quantity: Generate single or multiple UUIDs
3. Click Generate: Instant generation with cryptographic security
4. Copy & Use: One-click copy for immediate use in your code

📚 Technical Specifications

• Standard Compliance: RFC 4122 compliant UUIDs
• Random Source: Cryptographically secure random number generation
• Performance: Generates 1000+ UUIDs per second
• Browser Support: Works in all modern browsers
• No Server Storage: All generation happens locally in your browser

❓ Frequently Asked Questions

What is a UUID?

A UUID (Universally Unique Identifier) is a 128-bit number used to uniquely identify information in computer systems. It’s also known as a GUID (Globally Unique Identifier).

Which UUID version should I use?

• Use UUID v4 for most applications where you need unique, random identifiers
• Use UUID v1 when you need time-ordered, sortable UUIDs

Are generated UUIDs really unique?

Yes! The probability of generating duplicate UUIDs is astronomically low. With UUID v4, you’d need to generate 2.71 quintillion UUIDs to have a 50% chance of a duplicate.

Can I use these UUIDs in production?

Absolutely! Our generator creates standard-compliant UUIDs that are safe for production use in databases, APIs, and applications.

How fast is the generation?

Our tool generates UUIDs in milliseconds. You can generate hundreds of UUIDs per second if needed.

Do you store the generated UUIDs?

No! All UUID generation happens locally in your browser. We never see or store any of your generated identifiers.

🛠️ Integration Examples

JavaScript/Node.js

// Copy the generated UUID from our tool
const userId = "f47ac10b-58cc-4372-a567-0e02b2c3d479";
 
// Use in your application
const user = {
  id: userId,
  name: "John Doe",
  email: "john@example.com"
};

Python

# Copy the generated UUID from our tool
import uuid
 
user_id = "f47ac10b-58cc-4372-a567-0e02b2c3d479"
# Validate the UUID
uuid.UUID(user_id)

SQL Database

-- Copy the generated UUID from our tool
INSERT INTO users (id, name, email) 
VALUES ('f47ac10b-58cc-4372-a567-0e02b2c3d479', 'John Doe', 'john@example.com');

🔗 Related Tools

• Password Generator - Create secure passwords
• Random String Generator - Generate random strings
• Slug Generator - Create URL-friendly slugs
• Hash Generator - Generate MD5, SHA hashes

📖 Learn More About UUIDs

UUIDs are essential in modern software development. They provide:

• Global Uniqueness: Virtually impossible to generate duplicates
• No Central Coordination: Can be generated independently
• Standard Compliance: Follows RFC 4122 specification
• Wide Support: Available in all major programming languages

🚀 Pro Tip: Bookmark this page for quick access to UUID generation whenever you need unique identifiers in your development projects!