Free UUID Generator

Generate random UUID v4 values instantly. Batch generate up to 100 UUIDs with customizable format options — all in your browser.

UUIDs are the backbone of modern software development — used as database primary keys, session identifiers, API request IDs, and more. This generator creates cryptographically secure UUID v4 values using the Web Crypto API. Generate one or many, toggle uppercase and hyphens, wrap in braces for C-style macros, and copy or download the results. Nothing is stored, transmitted, or tracked.

Version

Quantity

v5 Namespace Settings

Namespace

Name

v5 is deterministic: same namespace + name always produces the same UUID.

Format Options

Uppercase Hyphens (with dashes) Braces ({uuid} format)

Quick Answer

UUID Generator is a Generate random UUID v4 values for developers — batch mode included. RFC 4122 compliant. by ThinkaBell. It runs all processing happens locally in your browser — no sign-up, no file uploads, and no data ever leaves your device.

Feature: Generate random UUID v4 values for developers
Feature: Batch mode included for bulk generation
Feature: Privacy-first — all generation runs in your browser
Feature: Free to use with no account or registration required
Privacy-first: no data collection, no tracking, no uploads.
Free forever: no premium tiers, no hidden charges, no accounts.

Key Terms

Web Application: A web application that runs entirely in your browser using HTML, CSS, and JavaScript. No software installation, no account creation, and no file uploads to external servers.
Client-Side Processing: All calculations and data processing happen on your device. Your information never leaves your browser, ensuring complete privacy and security.
Developer Tools: A utility accessible through a web browser at no cost. ThinkaBell tools are free with no premium tiers, no usage limits, and no account requirements.