UUID Generator

Generate various types of UUIDs (Universally Unique Identifiers) for your applications. Choose from different versions based on your specific needs.

v1MAC + Timestampv4Randomv6Timestamp Reorderedv7DB OptimizedNILEmptyGUIDMicrosoft

UUID v7 (Database Optimized)

Generate time-ordered UUIDs based on Unix Epoch time. Perfect for database performance, reduces index fragmentation, and maintains chronological order. Ideal for primary keys in distributed systems.

Bulk Generation

Generate multiple UUIDs at once for batch operations

Or

Only 1 to 10,000 allowed

API Information

Use these endpoints to integrate UUID generation into your applications

GEThttps://fastweb.tools/api/uuid/v7

Generate a single v7 UUID

GEThttps://fastweb.tools/api/uuid/v7?count=100

Generate multiple v7 UUIDs (max: 10,000)

What is UUID v7? Database Optimized

UUID v7 (version 7) is the newest UUID standard designed specifically for database performance. It uses Unix Epoch timestamp followed by random data, creating naturally sortable UUIDs without revealing MAC addresses.

Structure:

  • Timestamp: 48-bit Unix Epoch timestamp (milliseconds)
  • Version: 4-bit version field (0111)
  • Random A: 12-bit random data
  • Variant: 2-bit variant field (10)
  • Random B: 62-bit random data

Key Features:

  • Natural lexicographic sorting by creation time
  • No MAC address exposure (privacy-friendly)
  • Excellent database index performance
  • Microsecond precision available in random section

Example Format:

018f4a9c-df4b-7a9c-8c7e-5e9b2d3f4a5b

When to Use UUID v7

✅ Perfect For:

  • Database primary keys - Optimal performance
  • High-throughput systems - Minimal index fragmentation
  • Event sourcing - Natural chronological ordering
  • Audit logs - Sortable by creation time
  • Distributed systems - No central coordination needed
  • Privacy-conscious apps - No MAC address exposure
  • Modern applications - Latest UUID standard

⚠️ Consider Alternatives When:

  • Library support is not available
  • Legacy systems require older UUID versions
  • Clock synchronization is unreliable

Database Performance:

Exceptional - Up to 50% faster insertions compared to v4 due to sequential ordering reducing B-tree page splits.

Technical Advantages & Implementation

Database Benefits

  • Reduced index fragmentation
  • Sequential insertion pattern
  • Better cache utilization
  • Faster range queries
  • Improved clustering performance

Privacy & Security

  • No MAC address revelation
  • Cryptographically secure random bits
  • Timestamp precision configurable
  • Safe for public exposure
  • GDPR/privacy compliant

Operational Benefits

  • Built-in creation timestamps
  • Natural sorting capability
  • Debugging and monitoring friendly
  • Partition-friendly for sharding
  • Time-based cleanup possible

Performance Benchmarks

vs UUID v4:
  • 50% faster database insertions
  • 30% less storage overhead (better compression)
  • Significantly faster range queries
vs UUID v1/v6:
  • Similar insertion performance
  • Better privacy protection
  • More reliable timestamp precision

Adoption & Future

UUID v7 is rapidly becoming the preferred choice for new applications, especially those prioritizing database performance. Major cloud providers and databases are optimizing for v7 patterns. It's the recommended UUID version for greenfield projects in 2024 and beyond.