UUID Generator
Generate cryptographically secure version-4 Universally Unique Identifiers (UUIDs) in bulk or individually. Customize formatting with uppercase letters, hyphens, and curly braces.
- 49aae26b-f41a-468a-80ae-85e4c5997ed3
- 25bc3454-15ce-414e-a2c2-74e29bed0bd1
- 327b503d-a8f3-46c0-b78a-aabfda4a3bba
- 5930fae8-d604-4998-b5c6-4604f38e9ec4
- 5e60db7b-7c68-4591-919c-124d30fe0725
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.