Is the UUID Generator free?

Yes. Every VersaTools tool is completely free — no account, no watermark, and no sign-up required.

Are the UUIDs sent to a server?

No. They are generated entirely in your browser and never leave your device. Nothing is uploaded or stored.

What version of UUID does this create?

Version 4 — random UUIDs. They are produced with crypto.randomUUID (with a secure crypto.getRandomValues fallback), so the version and variant bits follow RFC 4122 exactly.

How likely are two UUIDs to collide?

Practically impossible. A v4 UUID has 122 random bits, so you would need to generate billions of them before a collision became even remotely likely. They are safe to use as unique keys.

Can I get them without hyphens or in uppercase?

Yes. Turn off Include hyphens for a compact 32-character string, and turn on Uppercase to capitalise the hex digits. The changes apply to the whole list immediately.

UUID Generator

Developer Utilities

Generate random UUIDs (v4) individually or in bulk.

UUIDs (0)

Options

How many10

UppercaseInclude hyphens

Version-4 UUIDs generated in your browser with a cryptographically secure random source. Nothing is uploaded.

Tool Overview & Guide

What is UUID Generator?

UUID Generator creates random version-4 UUIDs — the universally unique identifiers used as primary keys, request IDs, and reference tokens across databases and APIs. Generate a single UUID or up to a hundred at once, switch between upper and lower case, and toggle the hyphens on or off to match whatever format your system expects. Everything is produced in your browser with a cryptographically secure random source and can be copied or downloaded in one click.

Technical Specifications & Supported Formats

Processing Engine:Client-side Native JavaScript & WebAssembly

Privacy & Security:100% In-Browser (Zero File Upload)

Supported Formats:All Standard Formats & Code Text

Max File Limit:100 MB

How to use UUID Generator

3 simple steps to complete your task directly in your browser:

Choose how many
Drag the How many slider from 1 to 100. A fresh batch is generated the moment the page loads and whenever you regenerate.
Pick a format
Toggle Uppercase to get A-F hex in capitals, and Include hyphens to switch between the standard 8-4-4-4-12 layout and a compact 32-character form.
Regenerate as needed
Click Regenerate to replace the whole list with brand-new random UUIDs using your current settings. Formatting changes apply instantly without regenerating.

Common uses

Create primary keys or foreign keys for database rows
Generate request, trace, or correlation IDs for logging
Produce idempotency keys for API calls
Seed test data and fixtures with unique identifiers
Name files, resources, or objects so they never collide
Bulk-generate identifiers for a data migration or import

Why choose VersaTools

100% private

Your files are processed inside your browser and are never uploaded to a server.

Free, no account

No sign-up, no watermark, no paywalled “premium” tier. Just open a tool and use it.

Instant

No upload, no queue, no server round-trip — work starts the moment you drop a file.

Runs in your browser

Built on open web standards. Works on any modern desktop browser, nothing to install.

No upload size caps

Nothing leaves your device, so there’s no server file-size limit — only your machine’s memory.

Yours to keep

Results download straight to your device in clean, standard file formats.