🔑 UUID Generator
Generate universally unique identifiers (UUID v4) compliant with RFC 9562 (formerly RFC 4122). Perfect for databases, APIs, session IDs, and any application requiring unique identifiers.
Generated UUIDs
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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:
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
- UUID v4 generation compliant with RFC 9562 (which replaced RFC 4122 in 2024)
- 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