🆔 UUID Generator

🆔 Secure: Version 4 UUIDs generated locally via your browser's Crypto API.

How to Use the UUID / GUID Generator

The UUID / GUID Generator is a developer-focused utility built for software engineers, database administrators, and QA testers who require universally unique identifiers on demand. Whether you are provisioning primary keys for distributed systems, mocking mock records, or creating trace tokens for API requests, this tool produces standard-compliant identifiers instantly.

Cryptographic Randomness & Version 4 Standards

Every generated identifier conforms strictly to the RFC 4122 Version 4 specification. Instead of pseudo-random algorithms that can produce duplicates in high-throughput workflows, this generator taps directly into the browser's native Web Crypto API (crypto.getRandomValues) to ensure maximum entropy and cryptographic unpredictability.

Custom Formatting Options

Tailor the output to match your database schema or code conventions:

  • Standard with Hyphens: The canonical 8-4-4-4-12 representation (e.g., 123e4567-e89b-12d3-a456-426614174000).
  • Hyphen-Free: Compact 32-character strings suitable for URL slugs or compact database fields.
  • Uppercase / Lowercase: Switch casing quickly to match PostgreSQL, SQL Server, or Java standards.
  • Braces Enclosed: Wraps keys in curly braces {...} for Windows registry or COM component compatibility.
  • Batch Generation: Produce multiple UUIDs at once with one-click clipboard copying.

Frequently Asked Questions (FAQ)

Q: Are these generated UUIDs sent or logged on any external server?
A: Never. The entire generation process executes strictly in your browser using client-side JavaScript. Keys are never transmitted, logged, or cached across any network.

Q: What is the probability of a duplicate Version 4 UUID collision?
A: Practically zero. A v4 UUID contains 122 bits of pure entropy, requiring billions of IDs generated every second for decades before the odds of a single collision become statistically meaningful.

Q: Can I use this utility offline?
A: Yes. Because Hapsas is a Progressive Web App, this tool continues generating valid cryptographic IDs without an active network connection.