Free Online UUID Generator - Generate UUID v1, v4, v7, GUID Instantly | UUIDMaker

Free Online UUID Generator

A UUID (Universally Unique Identifier) is a 128-bit identifier that is unique across space and time, commonly used in software development for database primary keys, API endpoints, and distributed systems.

UUIDMaker.dev provides a free, instant UUID generation service with no setup required. Generate UUIDs online or use our REST API for programmatic access. Perfect for developers who need unique identifiers without installing libraries or writing custom code.

Use Cases

  • Database Primary Keys - Use UUIDs as primary keys in databases to ensure uniqueness across distributed systems and avoid conflicts during data migration.
  • Message Queues - Generate unique message IDs for reliable message delivery and deduplication in event-driven architectures.
  • Distributed Systems - Create unique identifiers for microservices, ensuring no conflicts across multiple servers and data centers.
  • Web Applications - Generate session IDs, API keys, and user tokens that are globally unique and secure.
  • Testing & Development - Create test data with unique identifiers for unit tests, integration tests, and development environments.
  • Tracking & Analytics - Generate unique tracking IDs for user sessions, events, and analytics data collection.
  • Logging & Monitoring - Create unique log entry IDs for better traceability and debugging in production systems.
  • Microservices - Generate unique request IDs, correlation IDs, and service identifiers for distributed tracing.

Frequently Asked Questions

A UUID (Universally Unique Identifier) is a 128-bit identifier that is unique across space and time. It's commonly used in software development for database primary keys, API endpoints, and distributed systems.

Use Version 4 for most cases (random, secure). Use Version 1 for time-ordered data. Use Version 7 for database performance. Use GUID for Microsoft compatibility. Use Nil UUID for testing.

Yes, UUIDMaker.dev is completely free to use. No registration, no API keys, no limits except rate limiting (10 requests/second per IP).

Yes, our service is production-ready. We use cryptographically secure random number generation and provide high availability.

Use our bulk generator to create up to 100 UUIDs at once, or use our API with the count parameter for programmatic access.

GUID is Microsoft's implementation of UUID. They follow the same standard but GUIDs are typically displayed in uppercase with braces.