UUID Generator

Free UUID generator for v4, v7 and NIL. Create unique identifiers in bulk with uppercase, hyphen-free and brace options, then copy or download — runs locally, no signup.

Generate cryptographically-random UUID v4, time-ordered UUID v7 and NIL identifiers in bulk, with uppercase, no-hyphen and brace formats — copy or download them in one click.

Category: Developer Tools
Includes: 6 features
Access: Free · No sign-up
Privacy: Runs in your browser

UUID Generator

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How to use

How to use UUID Generator

01
Set the amount
Choose how many UUIDs you need.
02
Pick a format
Toggle uppercase, no hyphens or braces.
03
Generate
Click generate for a fresh batch.
04
Copy
Copy all UUIDs to your clipboard.

Use cases

Common use cases

—Seed database primary keys
—Create unique API request IDs
—Generate test fixtures and mock data
—Produce idempotency keys

Overview

Random and time-ordered IDs on demand

A UUID (Universally Unique Identifier) is a 128-bit value used to label database rows, API resources, files and messages without a central authority handing out numbers. This generator creates version-4 UUIDs, whose bits are almost entirely random, plus modern version-7 UUIDs that embed a millisecond timestamp so they sort chronologically — ideal as database primary keys. It uses your browser's cryptographically secure random number generator, so collisions are effectively impossible.

Format them the way your code expects

Need them uppercase for a legacy system, stripped of hyphens for a compact key, or wrapped in braces like a Windows GUID? Toggle the options and every UUID reformats instantly. Switch between v4, v7 and the all-zero NIL UUID, generate up to a thousand at a time, and copy the whole list or download it as a text file. Everything happens locally, so nothing is ever transmitted.

Features

01: UUID v4 (random) and v7 (time-ordered) versions
02: NIL UUID plus bulk generation up to 1000
03: Cryptographically secure randomness
04: Uppercase, no-hyphen and brace (GUID) formats
05: Copy all or download as a .txt file
06: Runs locally — no server calls, no signup

FAQ

Frequently asked questions

What is a UUID v4?+

A version-4 UUID is a 128-bit identifier whose bits are almost all random. It's the most common UUID type because it needs no central coordination and has a negligible chance of collision.

Are these UUIDs truly random and safe to use?+

Yes. They're generated with your browser's cryptographically secure random source (crypto.randomUUID or crypto.getRandomValues), which is suitable for identifiers.

Can I generate many at once?+

Yes — create up to 1,000 UUIDs in a single batch and copy them all with one click.

Is anything sent to a server?+

No. All generation happens locally in your browser, so your identifiers never leave your device.