UUID Generator

UUID Generator

Generate UUIDs (Universally Unique Identifiers) instantly. Support for UUID v4 format.

Benefits of Using UUID Generator

Unique Identifiers

Generate globally unique identifiers that are guaranteed to be unique across different systems and time periods.

No Coordination Required

UUIDs can be generated independently without needing to coordinate with a central authority or database.

Privacy Protection

UUIDs don't reveal information about the system or creation time, providing better privacy than sequential IDs.

Standard Compliance

Generated UUIDs follow RFC 4122 standard, ensuring compatibility across platforms and programming languages.

Key Features

Generate UUID v4 (random UUIDs)
Generate multiple UUIDs at once
RFC 4122 compliant
Cryptographically secure random generation
Works entirely offline
Free to use with no limitations

How to Use

1

Generate UUID

Click "Generate" to create a single UUID v4, or "Generate Multiple" to create multiple UUIDs at once.

2

Copy UUID

Copy the generated UUID(s) using the copy button or select and copy manually.

3

Use in Your Project

Use the UUID(s) in your database, API, or application as unique identifiers.

Understanding UUIDs and Unique Identifiers

UUID (Universally Unique Identifier) is a 128-bit identifier used to uniquely identify information in computer systems. UUIDs are standardized by the Open Software Foundation (OSF) and are widely used in distributed systems, databases, and web applications.

Our free UUID generator tool helps developers create UUIDs instantly. Whether you're working on database design, API development, or distributed systems, UUIDs provide a reliable way to generate unique identifiers without coordination between systems.

Why UUIDs Matter

  • Uniqueness: UUIDs are designed to be unique across time and space, making them ideal for distributed systems where multiple systems generate identifiers independently.
  • No Central Authority: Unlike sequential IDs, UUIDs don't require a central authority or coordination, making them perfect for distributed architectures.
  • Privacy: UUIDs don't reveal information about the system or time of creation, providing better privacy compared to sequential IDs.
  • Standardization: UUIDs follow RFC 4122 standard, ensuring compatibility across different platforms and programming languages.

Common UUID Use Cases

  • Database primary keys and foreign keys
  • API request and response identifiers
  • Session IDs and authentication tokens
  • File and resource identifiers
  • Distributed system node identification
  • Transaction IDs and tracking numbers

Our tool generates UUID v4 (random UUIDs) using cryptographically strong random number generators. All UUIDs are generated locally in your browser, ensuring complete privacy and security. No data is sent to any server.

Code Examples

JavaScript UUID Generation

// Using crypto.randomUUID() (modern browsers)
const uuid = crypto.randomUUID();
console.log(uuid);
// Output: "550e8400-e29b-41d4-a716-446655440000"

// Using our tool
// Click "Generate" to get a UUID instantly

Node.js UUID Generation

// Using crypto.randomUUID() (Node.js 14.17.0+)
const { randomUUID } = require('crypto');
const uuid = randomUUID();
console.log(uuid);

// Using uuid package
const { v4: uuidv4 } = require('uuid');
const uuid = uuidv4();
console.log(uuid);

Python UUID Generation

import uuid

# Generate UUID v4
uuid_value = uuid.uuid4()
print(uuid_value)
# Output: "550e8400-e29b-41d4-a716-446655440000"

# Convert to string
uuid_string = str(uuid_value)
print(uuid_string)

Database Usage

-- SQL Example: Using UUID as primary key
CREATE TABLE users (
    id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
    username VARCHAR(255) NOT NULL,
    email VARCHAR(255) NOT NULL
);

-- Insert with UUID
INSERT INTO users (id, username, email)
VALUES (gen_random_uuid(), 'john_doe', 'john@example.com');

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