UUID Generator
Generate cryptographically secure version-4 Universally Unique Identifiers (UUIDs) in bulk or individually. Customize formatting with uppercase letters, hyphens, and curly braces.
- 00b322ae-cc28-41a7-a340-7976bb76649e
- 8f02e1e1-56f1-4355-8bf5-b8ba4c8672cb
- c0b0ad37-ee88-417b-98c6-a8731859c15a
- d42d8fa7-56ea-432d-a093-940ddd6a57d7
- f51816ee-64b3-4099-ac89-cfc54a7c509a
Cryptographically secure randomness
All UUIDs are created using the browser's native Web Cryptography API (`crypto.getRandomValues`), providing true cryptographically strong pseudo-random numbers conforming to RFC 4122 specifications.
Bulk generation with instant export
Generate from 1 up to 500 UUIDs in a single click. Copy individual UUIDs, copy the entire list, or download them as a clean plain-text (.txt) file for development, mock database seeding, or testing environments.
How to generate UUIDs online
- Select the quantity of UUIDs you wish to generate.
- Configure formatting options: Uppercase, Hyphens, or Curly Braces.
- Click 'Generate New UUIDs' to refresh the list with freshly generated identifiers.
- Click 'Copy' on any row, 'Copy all', or 'Download .txt' to export your identifiers.
Frequently Asked Questions
What is a version 4 UUID?
A Version-4 UUID is a 128-bit identifier generated using random numbers. With 2^122 possible UUIDs, the probability of collision is virtually zero.
Are these UUIDs generated securely?
Yes. They use the browser's hardware-backed Web Crypto API rather than standard Math.random().
Can I generate UUIDs without hyphens?
Yes. Simply uncheck the 'Hyphens' box to generate compact 32-character hexadecimal UUIDs.