UUID Generator

What Is a UUID Generator?

A UUID Generator creates Universally Unique Identifiers — 128-bit labels formatted as xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx — that are statistically guaranteed to be unique across systems and time. UUID v4 (random) is the most widely used version, generating identifiers using cryptographically secure random numbers. UUIDs are used as primary keys in databases, request IDs in distributed systems, session tokens, file names, and anywhere a collision-free unique identifier is needed without central coordination.

How to Use the UUID Generator

1. Click Generate to create a new UUID v4.
2. Use the quantity input to generate multiple UUIDs at once (up to 100).
3. Click Copy to copy all generated UUIDs to your clipboard.
4. Click Regenerate to create a fresh set of UUIDs.

Features

• Generate UUID v4 (random) using the browser's crypto API
• Bulk generation — up to 100 UUIDs at once
• Copy all UUIDs to clipboard in one click
• Runs entirely in your browser — no network requests
• Uppercase / lowercase toggle

FAQ

What is a UUID?

A UUID (Universally Unique Identifier) is a 128-bit label used to uniquely identify objects in computer systems. It is formatted as 32 hexadecimal digits displayed in 5 groups: xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx.

What is UUID v4?

UUID v4 is randomly generated. It uses 122 random bits to create an identifier with an astronomically low probability of collision, making it safe to use without a central registry.

Are these UUIDs truly unique?

UUID v4 uses cryptographically secure random generation (crypto.randomUUID). The probability of generating two identical UUIDs is effectively zero for any practical application.

Can I generate multiple UUIDs at once?

Yes. Use the bulk generation option to generate up to 100 UUIDs at once, then copy them all to your clipboard.