UUID Generator

Generate universally unique identifiers (UUID v4) compliant with RFC 4122. Perfect for databases, APIs, session IDs, and any application requiring unique identifiers. Cryptographically secure and collision-resistant.

Number of UUIDs:

Generated UUIDs

Click "Generate" to create UUIDs

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What is a UUID?

A UUID (Universally Unique Identifier), also known as GUID (Globally Unique Identifier), is a 128-bit number used to uniquely identify information in computer systems. UUIDs are generated in such a way that they are practically guaranteed to be unique across space and time.

UUID Format

A UUID is typically displayed as 32 hexadecimal digits in five groups separated by hyphens:

550e8400-e29b-41d4-a716-446655440000

Why Use UUIDs?

Database Primary Keys: Create unique IDs without database coordination
Distributed Systems: Generate IDs across multiple systems without conflicts
Session Identifiers: Track user sessions securely
API Keys: Generate unique tokens for authentication
File Names: Create unique temporary file names
Message IDs: Track messages in queuing systems

UUID Version 4

This tool generates UUID version 4, which is based on random numbers. Version 4 UUIDs have 122 random bits, providing an extremely low collision probability. The chance of generating duplicate UUIDs is negligibly small even when generating billions of identifiers.

Features

RFC 4122 compliant UUID v4 generation
Cryptographically secure random number generation
Bulk generation (up to 100 UUIDs at once)
One-click copy to clipboard
No data sent to server - all generated locally
Mobile-friendly interface