About this UUID generator
A UUID (universally unique identifier) — also known as a GUID on Microsoft systems — is a long ID like 550e8400-e29b-41d4-a716-446655440000. Developers use them to label database records, files, API requests and sessions with an identifier that is practically guaranteed to be unique, even across different machines and databases, without any central authority handing out numbers. This tool creates version 4 UUIDs, the most popular kind, built from random data so they reveal nothing about when or where they were made. You can generate up to 100 at once and copy them all in one tap. The randomness comes from your browser's built-in cryptographically secure generator, and nothing ever leaves your device.
Frequently asked questions
- What is a UUID?
- A 36-character ID (also called a GUID) used to label things uniquely — database rows, files, sessions.
- What is version 4?
- A UUID built from random numbers — the most common type, because it leaks no time or hardware info.
- Are they safe to use?
- Yes — generated in your browser with a cryptographically secure random source, never uploaded.