How to Generate UUIDs — Developer Guide

UUIDs are essential for distributed systems, database primary keys, and API identifiers. Generate them instantly with our UUID Generator or learn how to generate them in your code.

Method 1: Use the Online UUID Generator

The fastest way to generate UUIDs is using our UUID Generator. Choose between v4 (random) and v7 (time-sortable), generate single or bulk UUIDs, and copy them with one click.

UUID v4 Example:     550e8400-e29b-41d4-a716-446655440000
UUID v7 Example:     018f3a6e-1b3c-7d4f-8000-123456789abc

Bulk generation:     Generate 5, 10, or 100 UUIDs at once

Method 2: Generate UUIDs in JavaScript

Modern JavaScript provides the Crypto API for generating UUIDs natively:

// UUID v4 (random) — built into modern browsers and Node.js
const uuid = crypto.randomUUID()
// → "550e8400-e29b-41d4-a716-446655440000"

// UUID v4 with lower compatibility (Node.js 14+, all browsers)
const uuid2 = crypto.randomUUID()

Method 3: Generate UUIDs in Other Languages

# Python
import uuid
uuid.uuid4()  # v4 random
uuid.uuid7()  # v7 time-ordered (Python 3.14+)

# Java
import java.util.UUID;
UUID.randomUUID();

# Go
import "github.com/google/uuid"
uuid.New()

# Rust
use uuid::Uuid;
let id = Uuid::new_v4();

UUID v4 vs v7: When to Use Each

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