UUID / GUID Generator
Generate cryptographically secure v4 UUIDs in bulk with options for case and formatting.
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Everything you need to know
Cryptographically Secure UUID Generator
Generate version 4 UUIDs using the browser's built-in crypto.getRandomValues() API. This provides 122 bits of cryptographic randomness per UUID, making collisions practically impossible — the probability of generating two identical UUIDs is astronomically low at about 1 in 5.3 x 10^36.
Batch Generation
Need multiple UUIDs? Generate up to 100 at once for database seeding, test data, or application configuration. Each UUID is displayed on its own line and can be copied individually with a hover button or all at once with the Copy All button.
Flexible Formatting
Customize your UUID output with uppercase or lowercase hex digits and with or without hyphens. The standard format is lowercase with hyphens (e.g., 550e8400-e29b-41d4-a716-446655440000), but some systems prefer uppercase or compact formats without separators.
Privacy & Security
All UUID generation runs entirely in your browser using the Web Crypto API. No UUIDs are transmitted to any server, logged, or stored. Perfect for generating identifiers for sensitive applications, database records, and API keys.
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