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UUID v4 Generator

Create standards-shaped UUID v4 identifiers with the browser crypto API. Generate up to twenty values at once for fixtures, records and distributed systems.

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FIELD NOTES

When to use UUID v4

UUIDs are 128-bit identifiers designed to be unique without a central counter. Version 4 uses random bits and is common for database records, request IDs and test fixtures.

Random UUIDs are excellent identifiers but not secrets. Avoid exposing sensitive meaning through surrounding data or assuming an identifier grants authorization.

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REFERENCE

UUID questions

Are these UUIDs random?

Yes. They use crypto.randomUUID from the browser Web Crypto API.

Can duplicates occur?

The probability is extremely small, but uniqueness should still be enforced where required.

Can I use them as passwords?

No. Identifiers and authentication secrets have different security requirements.