About this tool
Create universally unique identifiers (UUID v4) for database records, test data, file names and API keys in development. Generate up to 100 at once and copy them as a list.
How to use it
- Choose how many UUIDs you need.
- Pick upper or lower case and whether to keep hyphens.
- Press Generate and copy the list.
Good to know
- UUIDs come from the browser's secure crypto.randomUUID function.
- Version 4 UUIDs are random, so the chance of a duplicate is extremely small.
- Nothing is stored or logged.
Frequently asked questions
What is a UUID v4?
A 128-bit identifier made from random numbers, written as 32 hexadecimal digits in five groups.
Can I use them as passwords?
Use the Password Generator for passwords. UUIDs are designed to be unique, not memorable or policy-compliant.