UUID Generator

UUID Generator produces RFC 4122 version 4 universally unique identifiers — 128-bit random values like "f47ac10b-58cc-4372-a567-0e02b2c3d479" that are effectively guaranteed never to collide, even when generated across millions of machines. Set a count and generate a batch of hundreds at once for database seeding, test fixtures, or Kafka event IDs. UUIDs solve a real distributed-systems problem. If your PostgreSQL table uses SERIAL primary keys, anyone who inspects your API can count how many orders you've processed. Switching to UUID v4 hides that information and lets different services generate IDs independently without a central coordinator — essential for microservices, offline-first apps, and multi-region writes. They're also the standard identifier in AWS resources, GraphQL node IDs, and many SaaS webhook payloads. The tool uses crypto.getRandomValues(), the same cryptographically strong random source your browser uses for TLS, so the IDs are suitable for session tokens and security-sensitive contexts where Math.random() would be predictable. You can toggle between hyphenated format (the standard 8-4-4-4-12 layout), compact hex without hyphens, or wrapped in braces for Microsoft GUID conventions.