UUID Generator

Generate globally unique identifiers (UUID) with support for multiple versions and formats, providing reliable unique identification solutions for development projects

🔐 Professional UUID Generator • RFC Standard Certified • Cryptographic Security

Professional UUID Generator

Universally Unique Identifier Online Tool - International Standards Compliant

Generate Universally Unique Identifiers (UUIDs) compliant with RFC 4122 and RFC 9562 standards. Our tool supports UUID versions v1, v4, and v7, using cryptographically secure random number generation algorithms. Widely used in database primary key design, distributed system architecture, microservice APIs, blockchain applications, and other professional scenarios. Each UUID ensures global uniqueness with extremely low collision probability (approximately 10^-37).

✓ RFC 4122/9562 Standard✓ Cryptographically Secure Random✓ Batch Generation Support✓ Multiple Format Output

⚙️ Configuration

Select UUID Version

⏰UUID v1 (Timestamp)

Based on timestamp + MAC address, extractable time info

RFC 4122 standard, contains node information

🎲UUID v4 (Random)

Completely random generation, industry standard

128-bit random number, extremely low collision probability

📈UUID v7 (Sortable)

Next-generation standard, supports time sorting

RFC 9562 new standard, millisecond-precision timestamp

Quantity

Supports batch generation, up to 100 UUIDs

Output Format Options

🔤 Uppercase Output➖ Include Hyphens (Standard Format)

Format Examples:
Standard: 550e8400-e29b-41d4-a716-446655440000
Compact: 550e8400e29b41d4a716446655440000

📋 Current Version Details

Cryptographically secure random generation, industry standard recommended version, suitable for most applications

🎯 Generation Results

🔐

Ready to Generate Your First UUID

Click "Generate Secure UUID" to begin

✨ Each UUID is generated using cryptographically secure algorithms

🌍 Ensures global uniqueness

🔐 Compliant with international RFC standards

🔍 Version Comparison

UUID v1 ⏰

Timestamp + MAC address
Sortable, contains time info

UUID v4 🎲 Recommended

Completely random generation
Privacy secure, widely used

UUID v7 📈 New Standard

Timestamp + random
Sortable, high performance

🚀 Use Cases

🗄️

Database Primary Keys

Replace auto-increment IDs, distributed-friendly

🔗

API Design

Resource identifiers, request tracking

⚡

Microservices

Transaction IDs, session identifiers

🔗

Blockchain

Contract addresses, transaction hashes

🔬 Technical Specifications

Standards Compliance

• RFC 4122 (v1-v5)

• RFC 9562 (v6-v8)

• ISO/IEC 9834-8

Technical Features

• 128-bit binary data

• 2^128 possible combinations

• ~10^-37 collision probability

💡 Professional Recommendations & Best Practices

🛡️ Security Considerations

• UUID v4 is the best choice for most scenarios, doesn't leak system information

• Avoid UUID v1 in scenarios requiring privacy protection

• Use HTTPS for UUID transmission to prevent man-in-the-middle attacks

⚡ Performance Optimization

• Store as binary(16) instead of varchar(36) in databases

• UUID v7 performs better in B-tree indexes

• Avoid frequent DOM operations during batch generation

🎯 Version Selection Guide

• New projects should use UUID v7

• Existing systems can continue using UUID v4

• Choose v1 or v7 for scenarios requiring time sorting

📐 Implementation Recommendations

• Standardize UUID version choice within teams

• Establish coding standards for UUID generation

• Clearly specify UUID format in API documentation

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