QR Studio

QR Studio is a privacy-focused, offline-capable Progressive Web App (PWA) for creating, customizing, and scanning QR codes natively on your device.

Because it is built entirely as a static client-side application, no data ever leaves your device. Once loaded, it works completely without an internet connection.

✨ Key Features

🛠️ Advanced Generation

Generate complex QR codes with built-in formatters:

• Plain Text & URLs: Includes a built-in UTM campaign builder.
• UPI Payments: Native routing for VPA, Bank Account + IFSC, Mobile numbers, and 12-digit Aadhaar.
• vCard (Contact): Standardized .vcf format for instant contact saving.
• Wi-Fi Networks: Auto-connect strings (WPA/WEP/Hidden).
• Calendar Events: Native iCal formatting.
• Phone / SMS / Email: Pre-filled intent URIs.

🎨 Customization & Accessibility

• Integrated Logos: Safely embed a center PNG/JPG logo (automatically bumps Error Correction to 'High').
• Custom Colors: Change foreground and background colors.
• Live Contrast Checker: Automatically calculates relative luminance (WCAG math) to warn you if your chosen colors will fail to scan on older smartphone cameras.

📷 Smart Scanning

• Camera Integration: Uses the environment-facing camera to decode QRs in real time.
• Image Upload: Scan a QR code from a saved photo with a built-in image preview.
• OS Web Share Target: (Standalone mode only) Share an image directly from your Android/Windows photo gallery to QR Studio to scan it instantly.

📱 PWA Features

• Installs as a native-feeling app on iOS, Android, and Desktop.
• Auto-syncs to your system's Light/Dark mode.
• Quick-action home screen shortcuts for "Create QR" and "Scan QR".

🚀 Live Demo & Installation

You can use the app instantly at: https://qr.blzr.sbs/

To install on your device:

• Android / Desktop (Chrome/Edge): Tap the menu icon (⋮) or look in the address bar and select "Install App".
• iOS (Safari): Tap the Share icon (⍐) and select "Add to Home Screen".

🔒 Privacy & Data

This app is essentially a set of static HTML, CSS, and JS files.

• No backend servers: There are no databases, analytics, or tracking scripts.
• Local processing: All image decoding and QR canvas drawing happen on your CPU/GPU using JavaScript.
• Persistent Settings: Your color and theme preferences are saved locally in your browser's localStorage.

💻 Running Locally

Because QR Studio is a purely static site, there is no build step or package manager required.

1. Clone the repository:

   git clone https://github.com/1bl4z3r/qr.git
   cd qr

2. Profit !!