QR Generator UI

A single-page QR code generator with extensive styling controls, logo support, and shareable configuration links.

Features

• Encode arbitrary text or URLs.
• Control error correction level, output size, margins, module and corner styles.
• Fine-tune colors with a custom lightweight color picker.
• Place a center logo with adjustable size and padding.
• Copy sharable configuration links or reset to defaults in one click.
• Automatic locale detection (RU/EN) with manual language switcher.

Getting Started

git clone https://github.com/<your-account>/<your-repo>.git
cd <your-repo>
open index.html   # macOS
# or
start index.html  # Windows

No build step is required—the project runs as a static page and can be deployed directly to GitHub Pages or any static hosting.

Live Demo

• https://nikolaysemenov.ru/qr/

Using The App

1. Open index.html in a browser.
2. Enter the text or URL you want to encode.
3. Adjust dimensions, colors, module shapes, and corner decorations as needed. The preview updates instantly.
4. Load a logo (PNG/JPG/SVG) if desired and tune its size/padding.
5. Press the chain-link icon in the header to copy a shareable link with the current settings (GET parameters).
6. Use the circular arrow icon to revert to the default configuration. Both icons become active only when your settings differ from the defaults.

Tips & Caveats

• Logo size: Large logos can obstruct finder patterns. Test QR readability (especially near the 95% size limit with low padding) using multiple scanners.
• URL parameters: All controls—except language—are synchronized to the address bar. A clean URL equals the default state.
• Logo files: Transparent PNG/SVG assets work best. Heavy SVGs may need optimization for performance.

Technical Stack

• qr-code-styling (bundled as vendor/qr-code-styling.js) for rendering.
• Custom vanilla JS state management with history.replaceState for URL sync.
• Inline lightweight color picker synced with native <input type="color">.
• Local storage preserves language preference between sessions.

License

• Distributed under the MIT License. See LICENSE for full text.