UUID Generator

Generate universally unique identifiers (UUID). UUID v1 (time-based) and UUID v4 (random) are supported.

UUID v4 is generated using completely random bit sequences. It is the recommended format for most applications that require uniqueness.

UUID Generator - Universally Unique Identifiers

Generate cryptographically secure, globally unique identifiers instantly. Perfect for database keys, session IDs, and distributed systems. Choose between time-based UUID v1 or random UUID v4 formats.

UUID v1 (Time-based)

Generated using timestamp and MAC address. Provides temporal ordering and is ideal for scenarios requiring chronological sorting.

550e8400-e29b-41d4-a716-446655440000

UUID v4 (Random)

Generated using cryptographically secure random numbers. Recommended for most applications due to unpredictability and security.

f47ac10b-58cc-4372-a567-0e02b2c3d479

Enterprise Applications

Database Primary Keys
Replace auto-incrementing IDs with globally unique identifiers
Distributed Systems
Generate unique IDs across multiple servers without coordination
Session Management
Create secure, unpredictable session identifiers for web applications
API Request Tracking
Correlate requests across microservices and logging systems

UUID Structure & Format

xxxxxxxx-xxxx-Mxxx-Nxxx-xxxxxxxxxxxx

■ Time/Random (32 bits)

■ Time/Random (16 bits)

■ Version + Time/Random (16 bits)

■ Variant + Clock/Random (16 bits)

■ Node/Random (48 bits)

Total Length:128 bits (36 chars)

Format:8-4-4-4-12

Character Set:0-9, a-f, -

🔒 Security & Uniqueness Guarantee

Collision Probability

UUID v4 collision probability is astronomically low:

2.71 × 10¹⁸ UUIDs needed for 50% collision chance

Standards Compliance

• RFC 4122 compliant
• ISO/IEC 9834-8:2005 standard
• Cross-platform compatible
• Database-friendly format

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