⚙️ QR Code Settings
🎯 QR Code Output
Enter text and click "Generate QR Code" to see the result
📚 About QR Codes
Complete guide to creating, using, and customizing QR codes for your business and personal needs
What is a QR Code?
QR (Quick Response) Code is a two-dimensional barcode that can be scanned using smartphones, tablets, or QR code readers to quickly access information:
- Fast Access: Instant link to URLs, text, or contact info
- Machine Readable: Scanned by cameras and QR readers
- Error Correction: Works even if partially damaged
- Compact: Stores up to 4,296 characters
- High Adoption: Supported on all modern devices
- Customizable: Can be branded with colors and logos
- Cost-Effective: Free to generate and print
How QR Codes Work
- Encoding: Data is encoded into a visual pattern
- Scan: Camera captures the QR code pattern
- Decode: Software decodes the pattern
- Action: Opens URL, displays text, or performs action
- Instant: No manual entry of URLs or contact info needed
Modern phones have built-in QR readers in their camera apps for instant scanning.
Tool Features
- Instant QR code generation
- Customizable size (100-2000px)
- Custom colors for pattern and background
- Preset color themes
- Logo/icon overlay support
- Character count display
- Download as PNG/JPG
- 100% browser-based generation
Common Use Cases
- Business: Business cards, invoices, product tags
- Marketing: Campaigns, advertisements, flyers
- Events: Tickets, check-ins, attendee tracking
- Contact Info: vCard sharing, phone numbers
- WiFi: Network credentials, easy connection
- Payment: Mobile payments, invoices
- Education: Classroom materials, attendance
Step-by-Step Guide
Basic QR Code:
- Enter text or URL to encode
- Adjust size if needed (300-400px recommended)
- Choose colors or use preset themes
- Click "Generate QR Code"
- Download or copy the QR code
- Use in print, digital, or share
With Logo/Icon:
- Enable "Advanced Options"
- Upload your logo/icon image
- Adjust logo size if needed
- Add border around logo (optional)
- Click "Generate QR Code"
- Download branded QR code
QR Code Structure
📍 Finder Patterns
Three squares in corners help scanners orient and locate the code.
🔄 Timing Patterns
Alternating black/white lines help determine size and shape.
📊 Data Area
Encoded data and error correction information in pattern.
⚪ Quiet Zone
White border around code for proper scanning.
🎨 Colors
Dark pattern on light background is standard.
🏷️ Logo Area
Optional logo in center, shouldn't exceed 20-30%.
QR Code Capacity
Maximum capacity varies by data type:
- Numeric: Up to 7,089 characters
- Alphanumeric: Up to 4,296 characters
- Byte Mode: Up to 2,953 bytes
- Kanji: Up to 1,852 characters
Most URLs fit in small to medium QR codes. Longer content requires larger codes.
Error Correction
QR codes have built-in error correction:
- Level L: ~7% recovery (default)
- Level M: ~15% recovery
- Level Q: ~25% recovery
- Level H: ~30% recovery
Higher levels allow codes to work even if partially damaged or obscured.
Customization Best Practices
✅ DO:
- Use high contrast (dark on light)
- Keep bright background (white or light)
- Use simple, recognizable logos
- Add white border around code
- Test scanning before use
- Use minimum 100px size for print
- Keep logo under 25% of code
- Use square aspect ratio
❌ DON'T:
- Use low contrast colors
- Make background too light/dark
- Use complex or busy logos
- Remove quiet zone border
- Assume it will work without testing
- Make QR code too small
- Cover more than 30% with logo
- Stretch or distort the code
QR Code Size Guide
📱 Small (100-200px)
Digital displays, email, close-up scanning
📄 Standard (300-400px)
Print materials, business cards, flyers
📊 Large (500-1000px)
Posters, billboards, far-distance scanning
🏢 Extra Large (1000-2000px)
Billboards, large installations, outdoor
Frequently Asked Questions
Q: How long does a QR code last?
A: Indefinitely if printed/stored properly. The URL can change, but the code itself doesn't expire.
Q: Can I edit a QR code after creation?
A: No. Generate a new one if content changes. Use dynamic QR services for changeable URLs.
Q: What if a QR code doesn't scan?
A: Ensure high contrast, proper size, good lighting, and clean camera lens. Test before use.
Q: Can I use colors in QR codes?
A: Yes, as long as contrast is high. Dark pattern on light background works best.
Q: What formats can I download?
A: PNG (best for web), JPG (good for print), SVG (scalable vector format).
Q: Can I add a logo to any QR code?
A: Yes, but keep it small (under 25%). Use error correction level H for reliability.
Related Tools
- One-Time Text Share - Share QR data securely
- Base64 Encoder - Encode data for QR
- URL Encoder - Encode URLs for QR codes
- JSON Formatter - Format data for QR codes
Pro Tips & Tricks
- Use URL shorteners for long URLs to reduce code complexity
- Add QR codes to business cards for instant contact sharing
- Use WiFi QR codes to help guests connect quickly
- Generate branded codes with your logo for professional look
- Test all QR codes with multiple devices before printing
- Include call-to-action text near QR code ("Scan to learn more")