UUID / GUID Generator
Generate cryptographically secure Version-4 (Random) and Version-7 (Time-Ordered) UUIDs in bulk with custom casing, hyphens, and formats.
How UUID / GUID Generation Works & Technical Principles
Create collision-resistant 128-bit Universally Unique Identifiers (UUID / GUID) locally using Web Cryptography API standards.
Technical Overview: RFC 4122 Version 4 Entropy & Collision Resistance
A UUID (Universally Unique Identifier) is a 128-bit value formatted as 32 hexadecimal characters across five hyphen-separated groups (8-4-4-4-12). In Version 4 UUIDs, 122 bits are purely random while 6 bits are reserved for version and variant metadata, reducing collision probability to virtually zero.
Input & Configuration
Choose your UUID version (v4 Random or v1 Timestamp) and configure format options like uppercase, hyphens, or braces.
Client-Side Processing
The browser's window.crypto API generates high-entropy random bytes using OS-level cryptographically secure random number sources.
Instant Output & Export
Generate single IDs or batches up to hundreds of UUIDs at once with one-click copy to clipboard or plaintext download.
Key Capabilities & Features
Cryptographically Secure Entropy
Uses window.crypto.getRandomValues instead of Math.random(), providing true cryptographic entropy.
Flexible Batch Generation
Generate from 1 to 500 UUIDs in a single click for database seeding, test fixtures, or distributed transaction tracing.
100% In-Browser Privacy Guarantee
Generates all IDs inside the browser sandbox, ensuring zero tracking or identifier logging.
Custom Format Presets
Toggle hyphens, uppercase or lowercase letters, curly braces, and base64-encoded representations.
A Universally Unique IDentifier (UUID) URN Namespace Specification
Compliant with CSPRNG standards for secure pseudo-random number generation