ToolsUUID Generator
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Generate random, cryptographically secure Version 4 UUIDs (Universally Unique Identifiers) and GUIDs in bulk with uppercase, lowercase, and hyphen toggles.
100% Client-Side Privacy
Tokens, code & payloads never leave your browser.
Zero Latency Execution
Instant processing via native browser Web APIs.
No Account Required
Unlimited, free access without paywalls or quotas.
Select how many UUIDs to generate and set your desired casing/hyphen formatting.
Click "Generate" to generate fresh RFC 4122 v4 unique identifiers.
Copy single or batch UUIDs directly to your clipboard for database seeders or primary keys.
Use UUID v4 strings as globally unique primary keys in distributed microservices and PostgreSQL/MySQL tables without central coordination.
// Example RFC 4122 v4 UUID
"f47ac10b-58cc-4372-a567-0e02b2c3d479"The probability of generating a duplicate UUID v4 is negligible. You would need to generate approximately 1 billion UUIDs per second for 85 years to have a 50% chance of a single collision.
Learn engineering best practices, design patterns, and code architecture related to this tool.