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🆔 UUID Generator
Generate universally unique identifiers
UUID Version
Version 4 (Random)
Version 1 (Timestamp)
Number of UUIDs
Format
Lowercase
Uppercase
With Braces
🎲 Generate UUIDs
📋 Copy All
🗑️ Clear List
📖 About UUIDs
UUID (Universally Unique Identifier):
128-bit number used to uniquely identify information
Version 4:
Generated using random numbers. Most commonly used. Example:
550e8400-e29b-41d4-a716-446655440000
Version 1:
Generated using timestamp and MAC address. Time-based and sortable.
Format:
8-4-4-4-12 hexadecimal digits (xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx)
💡 Common Uses
Database primary keys (PostgreSQL, MongoDB, etc.)
API request/session identifiers
File naming and versioning
Distributed systems synchronization
Transaction tracking
Unique resource identifiers in microservices
⚠️ Security Note
All UUIDs are generated locally in your browser using crypto.getRandomValues()
Version 4 UUIDs are cryptographically random and suitable for security-sensitive applications
Version 1 UUIDs contain timestamp information and may be predictable
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