Generate deterministic UUID v3 and v5 identifiers online for free. Use namespaces and name strings to create RFC 4122 compliant unique identifiers instantly.
AI Generation Prompt
Technical Specification: Namespace-Based UUID Generator (v3 & v5)
Overview
This single-file web application serves as a deterministic utility to generate RFC 4122 compliant UUIDs (Version 3 and Version 5). Unlike random UUIDs (v4), v3 and v5 UUIDs allow developers to generate the same identifier given the same namespace and input name, which is critical for deduplication and resource referencing.
Core Features
- Algorithm Selection: Toggle between UUID v3 (MD5) and UUID v5 (SHA-1).
- Namespace Presets: Quick-select common namespaces (DNS, URL, OID, X500).
- Custom Namespace Support: Ability to input a custom UUID string as a namespace.
- Name Input: Real-time generation as the user types.
- In-Memory History: A session-based history table (non-persistent) allowing users to track recent generations without local storage.
- Copy Functionality: One-click copy to clipboard with non-intrusive UI feedback.
- Responsive Design: Mobile-first layout that adapts seamlessly to desktop or phone screens.
UI Layout
- Header: Simple, clean, centered header with tool title and a one-sentence descriptive subtitle.
- Main Interaction Panel:
- Left/Top Column: Configuration area (Algorithm radio buttons, Namespace dropdown/input, Name input field).
- Right/Bottom Column: Result display area with a large, monospaced font output and a prominent 'Copy' button.
- History Area: A collapsible or fixed-height table beneath the main generator showing the last 10 generated identifiers.
- UI Feedback: Toast-style notifications for actions like "Copied to Clipboard" (no browser-native alerts).
Aesthetic & Styling
- Palette:
- Background:
#F8FAFC(Light Gray/Blue tint) - Primary Accent:
#2563EB(Professional Blue) - Text:
#1E293B(Dark Slate for readability) - Card/Container:
#FFFFFFwith soft shadows (0 4px 6px -1px rgba(0, 0, 0, 0.1))
- Background:
- Transitions: Smooth fade and slide animations for input changes and history updates.
- Accessibility: High-contrast text, proper label tagging for all inputs, and keyboard-navigable structure.
Technical Implementation Constraints
- Build: Pure HTML, CSS, and Vanilla JavaScript. No frameworks or external build tools.
- Libraries: Only lightweight CDNs (e.g., UUID-js library for hashing, Tailwind CSS for layout) permitted.
- Persistence: Strictly NO
localStorage,sessionStorage, or cookies. The history list must be stored in a simple JavaScript Array variable and will wipe upon page refresh. - Environment: The app must be compatible with a sandboxed iframe. Any external interactions (like opening GitHub links) must use
target="_blank"andrel="noopener noreferrer". - Feedback: All alerts, prompts, or notifications must be built using custom DOM elements (divs) rather than browser
alert()orprompt()functions.
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Files being used
Frequently Asked Questions
Everything you need to know about using this application.
What is the difference between UUID v3 and v5?
UUID v3 utilizes the MD5 hashing algorithm, whereas UUID v5 utilizes the SHA-1 algorithm. Both are deterministic, meaning they will always produce the same unique identifier for a specific namespace and name pair.
Is this tool safe to use with sensitive data?
Yes. This application runs entirely client-side within your browser. No data is sent to a server, and no information is stored, keeping your namespace and name inputs completely private.
Can I use custom namespaces?
Absolutely. You can select standard pre-defined namespaces like DNS or URL, or input your own valid UUID string to act as the namespace for custom identifier generation.
