QR Codes Explained: What They Are, How They Work, and How to Make One Free

## What Is a QR Code? A QR (Quick Response) code is a 2D barcode that can encode text, URLs, contact information, WiFi credentials, and more. ## What Can a QR Code Contain? - **URL:** Links to a website or app - **Plain text:** Messages, notes, instructions - **WiFi:** Share network credentials without typing - **vCard:** Contact information for business cards - **Email:** Pre-filled email to a specific address ## Generate a Free QR Code The QR Generator creates QR codes for all of the above. Everything runs in your browser. **Tips for printing:** 1. Use H error correction level so a logo can overlay the center 2. Minimum print size: 2.5cm × 2.5cm 3. Always test the printed code before distributing 4. Use the PNG download at 512px+ for print quality ## Dynamic vs Static QR Codes The QR codes generated here are **static** — the destination is baked into the code. For fixed uses, static codes are perfect.