QR Code Generator

Convert text or URLs into QR code images

QR Code Settings

šŸ’¼ Practical Use Cases

šŸ“£ Marketing Applications

Place QR codes on business cards, posters, and flyers to drive traffic from offline to online. Track effectiveness through UTM parameters and analytics tools. Ideal for event promotions, SNS follow campaigns, and app downloads.

šŸ¢ Business Applications

Use QR codes on product packaging, store POP displays, and menu boards to provide detailed product information, collect customer feedback, and enable online ordering. Reduce printing costs by replacing paper materials with QR codes.

šŸ‘¤ Personal Use

Share WiFi passwords, exchange contact information, and share personal profiles or portfolios. Create QR codes for resumes, digital portfolios, and social media profiles for quick information sharing.

šŸŽ‰ Event Management

Use QR codes on event invitations, tickets, and name tags for attendee check-in and registration. Enable real-time information sharing, surveys, and photo galleries during events.

šŸ’” Pro Tips

1
Size settings: Minimum 2cm x 2cm for printing, 10-15cm recommended for posters. Ensure scannable distance is considered for physical media placement.
2
Error correction level: Use M or higher for print materials, Q for outdoor use or when durability is critical. Higher levels allow scanning even when damaged.
3
Color contrast: Use dark foreground (black recommended) and light background (white recommended) for optimal scanning. Maintain minimum 70% contrast ratio.
4
URL shortening: Use URL shortening services for long URLs to create simpler QR codes. Shorter content reduces code complexity and improves scanning reliability.
5
Testing required: Test with multiple devices and apps before printing. Verify scanning at intended distances and lighting conditions to ensure reliability.

Frequently Asked Questions

How much data can a QR code store?
Depending on error correction level and character type, text can store about 2,000-4,000 characters, numbers up to 7,000 characters. Higher error correction reduces capacity but increases reliability.
Why won't my QR code scan?
Common issues include too small size, insufficient contrast, physical damage, or inappropriate scanning distance. Ensure minimum 2cm x 2cm size, high contrast colors, and clean printing quality.
What should I consider when printing QR codes?
Maintain minimum 2cm x 2cm size, 300DPI+ resolution for professional printing, sufficient white margin (quiet zone), and clear contrast. Always test printed codes before mass production.
Which error correction level should I choose?
General use: M (15%), print materials or outdoor use: Q (25%), maximum security or high-damage risk: H (30%). Higher levels reduce data capacity but improve reliability when codes are damaged or dirty.
How can I manage QR code security?
Use HTTPS links only, utilize your own domain for tracking and control, implement URL expiration dates for sensitive content, monitor access logs, and avoid including personal information directly in QR codes. Use URL shortening services with caution as they can be tracking vectors.

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QR Code Generator | DDTool