UUID/GUID Generator - Batch UUIDv4

UUID (Universally Unique Identifier) is a 128-bit identifier standard designed to ensure global uniqueness in distributed systems without requiring central coordination.

GUID (Globally Unique Identifier) is Microsoft's implementation of UUID. They are essentially identical and are now used interchangeably.

UUID has multiple versions. Version 4 (v4) is the most commonly used, generated entirely from cryptographically secure random number generators (CSPRNG). This tool supports batch generation of standard UUIDv4.

Common Formats:

• 550e8400-e29b-41d4-a716-446655440000 — Standard format (hyphenated, lowercase)
• {550E8400-E29B-41D4-A716-446655440000} — Uppercase with braces
• '550e8400e29b41d4a716446655440000' — Plain hex string (no hyphens)

Typical Use Cases:

• Database primary keys (Primary Key), avoiding predictability issues with auto-increment IDs
• API request IDs for distributed tracing
• Distributed system transaction IDs ensuring cross-service uniqueness
• Temporary filename or session identifier generation

This tool supports customizable count, case, hyphens, braces, quotes, and comma separation. Try the UUID Generator →

This UUID generator uses a 100% frontend-only operation architecture. All UUID generation happens directly in your browser locally.

Specifically:

• Random number generation uses the browser-native crypto.getRandomValues() API, compliant with RFC 4122
• Generated UUIDs are never uploaded to any server and never transmitted over the network
• All data vanishes immediately when the page closes; no persistent storage is used

For highly sensitive scenarios (e.g., security token generation), we recommend using this tool offline and manually post-processing the output before deployment.