Are these cryptographically secure?

When no seed is set they are suitable for ids; for security-sensitive randomness use a dedicated CSPRNG.

UUID v4 Generator

Live

Generate UUID v4 identifiers in bulk.

All generated data is fictional and intended for development, testing, QA, prototyping, and automation only. Do not use it for fraud, impersonation, or illegal activity.

Configure the options and press Generate to produce output.

About this tool

RFC-4122 version-4 UUIDs for primary keys, idempotency keys and correlation ids. Set a seed for reproducible ids in tests.

How it works

Choose how many UUIDs to generate, and toggle uppercase or hyphens.
Optionally set a seed for reproducible ids in tests.
Press Generate, then Copy, Download JSON or Download CSV.

Example output

[
  "3399bb01-a23b-436d-b90c-5129adcdda1c",
  "a22c1d20-cecf-4262-a228-541a69fc7eba"
]

API endpoint

curl "https://codetoolshub.dev/api/v1/common/uuid?count=3"

API

Frequently asked questions

Are these cryptographically secure?: When no seed is set they are suitable for ids; for security-sensitive randomness use a dedicated CSPRNG.