QR Code Generator
URL or Text QR Code
Enter URL, text, or any content
Contact Card QR Code (vCard)
Create QR code for contact information
WiFi Network QR Code
Share WiFi access via QR code
Email or SMS QR Code
Create QR for email or SMS
QR Code Generated
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QR codes store data in a 2D barcode format readable by smartphones. The more data you encode, the more complex the pattern becomes. Use high contrast colors for reliable scanning. Test your QR code with a scanner to ensure it works correctly before sharing.
QR Code Generation & Usage Guide
QR codes (Quick Response codes) are 2D barcodes that can store text, URLs, contact information, and more. They're widely used for marketing, contact sharing, WiFi access, and information distribution.
QR Code Data Types
| Type | Data Format | Max Characters | Use Cases |
|---|---|---|---|
| URL | https://example.com | 2953 | Website links, landing pages |
| Text | Plain text or numbers | 4296 | Messages, codes, information |
| mailto:email@example.com | 2953 | Contact, newsletter signup | |
| Phone | tel:+1234567890 | 100 | Call action, contact info |
| SMS | sms:+1234567890?body= | 160+ | Text messaging campaigns |
| WiFi | WIFI:T:WPA;S:SSID;P:pass | 500 | Network sharing, guest access |
| vCard | Contact information format | 2953 | Business cards, contact exchange |
| Calendar | Event details in iCal format | 2953 | Event invitations |
QR Code Versions & Size
| Version | Module Count | Max Data (Bytes) | Typical Use |
|---|---|---|---|
| Version 1 | 21×21 | 17 | Very short text/numbers |
| Version 5 | 37×37 | 154 | Phone number, short URL |
| Version 10 | 57×57 | 557 | Email, contact info |
| Version 20 | 97×97 | 2331 | Long URL, vCard |
| Version 40 | 177×177 | 4296 | Maximum capacity |
Error Correction Levels
| Level | Symbol | Recovery Capacity | Best For |
|---|---|---|---|
| L (Low) | ~7% | Recovers from 7% damage | Clean environments, test purposes |
| M (Medium) | ~15% | Recovers from 15% damage | Standard use, balanced |
| Q (Quartile) | ~25% | Recovers from 25% damage | Outdoor, printed codes |
| H (High) | ~30% | Recovers from 30% damage | Harsh environments, logos embedded |
Best Practices for QR Code Design
- Color Contrast: Use high contrast colors. Black on white is most reliable. Avoid similar shades.
- Quiet Zone: Leave white space around QR code. Minimum 4 modules (pixels) border.
- Size: Minimum 2cm×2cm for reliable scanning at 20cm distance. Larger is better for distance scanning.
- Logo Placement: Can embed logo in center using high error correction, but reduces capacity.
- Test Before Use: Always scan generated codes with multiple devices/apps before distribution.
- Print Quality: Use high resolution printers (300+ DPI). Inkjet/laser both work well.
- Background: Avoid patterned backgrounds. Plain solid colors work best.
- Dynamic QR: Use URL shorteners or tracking services for clickable statistics.
Scanning Tips
- Hold phone 15-25cm from QR code at slight angle
- Ensure good lighting - low light reduces scan rate
- Use native camera app (iPhone) or QR scanner app (Android)
- Clean phone camera lens for better focus
- Some codes may require permission to open links
Common QR Code Applications
- Marketing: Advertisements linking to landing pages, promotional campaigns, product information
- Contact Sharing: Business cards, conference badges, networking events
- WiFi Access: Guest network sharing without password sharing verbally
- Payment: Mobile payments, app downloads, payment links
- Event Management: Ticket verification, check-in systems, event information
- Product Tracking: Inventory management, authentication, product details
- Menu Sharing: Restaurant menus (especially post-pandemic contactless menus)
- Social Media: Link to profiles, follow buttons, sharing campaigns
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Frequently Asked Questions
1. Can QR codes expire?
Static QR codes don't expire - the data is encoded in the image. Dynamic QR codes (via URL shortener) can "expire" if the service shuts down. Always backup important QR code links.
2. How many times can a QR code be scanned?
Unlimited times. QR codes are read-only and can be scanned infinitely. The code doesn't degrade from scanning. Physical degradation (wear, damage) can affect scannability.
3. Is it safe to scan random QR codes?
Be cautious. QR codes can link to malicious sites or trigger unexpected actions. Scan only from trusted sources. Some phones show the URL before opening, allowing you to verify first.
4. Can I add a logo to my QR code?
Yes, but only up to 20-30% of the code area using high error correction (H level). Larger logos reduce scannability. Test thoroughly before using.
5. What colors work best for QR codes?
High contrast is essential: black on white is standard and most reliable. Dark colors on light backgrounds work (dark blue on light grey). Avoid similar tones and pastels.
6. How large should a QR code be?
Minimum 2cm×2cm for close scanning (20cm distance). Larger (5-10cm) for distance or outdoor use. Scale proportionally - don't distort the square shape.
7. Can I track QR code scans?
Yes, using dynamic QR codes with URL tracking services (bit.ly, TinyURL, custom solutions). Static codes can't be tracked directly but can link to tracking URLs.
8. What devices can scan QR codes?
Any smartphone with camera and QR reader: iPhone (Camera app or built-in), Android (built-in, Google Lens), dedicated QR scanner apps. Laptops with webcam can use online scanners.
9. Can I customize QR code appearance?
Yes. Color, size, and some services allow rounded corners, gradients, logos. However, too much customization reduces scannability. Keep changes subtle.
10. What's the difference between static and dynamic QR?
Static: Data encoded in image, fixed, free. Dynamic: Points to shortened URL, changeable, allows tracking, usually paid. Dynamic gives analytics but requires active service.
11. How do I know if my QR code works?
Test with at least 2-3 devices/apps before distribution. Scan at different distances and angles. Use professional QR scanner apps for verification.
12. Can QR codes store images or files?
No, directly. QR codes store URLs, text, or contact info up to 4296 characters. To share files, encode a download link pointing to the file hosted online.