How likely is a UUID collision?

For Version 4 UUIDs, the probability of a collision is astronomically small — effectively negligible for any practical application.

What is the difference between a UUID and a GUID?

They are functionally the same concept; GUID is Microsoft's term, traditionally formatted with braces and uppercase — see the dedicated GUID Generator tool.

Is my generated UUID sent anywhere?

No — it is generated and displayed entirely in your browser.

Can I generate more than 100 UUIDs at once?

The tool is capped at 100 per generation — run it again for more.

Are these UUIDs suitable for security tokens?

Version 4 UUIDs use a cryptographically secure random source, making them reasonable for many token uses, though dedicated token-generation schemes may be preferable for high-security contexts.

Do UUIDs need to be globally registered?

No — that is the point of a UUID: it can be generated independently, anywhere, without registering it with any authority.

Identificadores y Herramientas Aleatorias

Generador de UUID — Herramienta Gratuita en Línea

Genera UUID aleatorios versión 4, uno a la vez o en lote.

Usar Esta Herramienta

Funciona en Tu Navegador
Resultados Instantáneos
100% Privado

How many

Uppercase Include hyphens

Saber Más

What Is a UUID?

A UUID (Universally Unique Identifier) is a 128-bit value, typically written as 32 hexadecimal digits in five groups (like 3f2504e0-4f89-11d3-9a0c-0305e82c3301), designed so that generating one independently, anywhere, is astronomically unlikely to collide with any other UUID ever generated.

Version 4 UUIDs — the kind this tool generates — are built from random bits, making them the simplest and most common way to create unique identifiers for database records, API resources, session tokens and file names without needing a central authority to hand them out.

¿Quién Usa Esta Herramienta?

Para Empresas

Generate unique identifiers for new database records or API resources.

Para Uso Personal

Generate a unique ID for a personal project or file naming scheme.

Para Estudiantes

Learn how UUIDs work for a databases or distributed systems course.

Para Oficinas

Generate unique reference numbers for internal tracking.

Por Qué Usar Esta Herramienta

Características Clave

Bulk Generation

Generate up to 100 UUIDs at once.

Format Options

Toggle hyphens and uppercase formatting.

Cryptographically Random

Uses your browser's Web Crypto API for true randomness.

100% Private

Generated entirely in your browser — nothing is transmitted.

El Resultado

Beneficios

No Collisions in Practice

Random UUIDs are effectively guaranteed to be unique across systems.

No Central Authority Needed

Generate unique IDs independently, without coordinating with a server.

Generate in Bulk

Create many UUIDs at once for seeding test data.

Paso a Paso

Cómo Usar Generador de UUID

Set Quantity & Format

Choose how many UUIDs and whether to include hyphens or uppercase.

Click Generate UUID

New random UUIDs appear instantly.

Copy the Result

Use the Copy button to grab all generated UUIDs.

Especificaciones

Detalles Técnicos

Detalle	Valor
Entrada	Generated text output, no input required
Procesamiento	Up to 100 UUIDs per generation
Salida	Version 4 (random) UUIDs using your browser's Web Crypto API

Puedes Verificarlo

Privacidad y Seguridad

Lo que realmente sucede con tu archivo al usar esta herramienta.

100% Client-Side

This tool runs entirely inside your browser using JavaScript — nothing you type or generate is ever sent anywhere.

No Upload, Ever

There is no file upload and no server processing step — your data never leaves your device.

Works Offline

Once this page has loaded, the tool keeps working even without an internet connection.

Nothing Stored

Nothing you enter is saved on our servers — refreshing the page clears everything.

No Tracking of Your Input

We have no way to see what you type, generate or convert with this tool.

Obtén Mejores Resultados

Consejos

Use as Primary Keys Carefully

UUIDs make great unique identifiers, though they take more storage than sequential integers.

Remove Hyphens for Compact Storage

Disable hyphens if a system expects a 32-character hex string without separators.

Preguntas Frecuentes