📱 QR Code FAQ

A QR code (Quick Response code) is a two-dimensional barcode that can be scanned by smartphones to instantly access information.

Key facts:

• Created in 1994 by Denso Wave (a Toyota subsidiary) in Japan
• Can store up to 4,296 alphanumeric characters
• Scanned by smartphone cameras (no app needed on modern phones)
• Works offline once generated - no internet needed
• Can be printed, displayed on screens, or embedded in images

What QR codes can encode:

• URLs and website links
• Text and messages
• Contact information (vCard)
• WiFi network credentials
• Payment information
• App download links
• Email addresses
• Phone numbers

Creating a QR code is simple and takes less than 30 seconds:

1. Visit a QR code generator (like TulBench QR Generator)
2. Enter your content: URL, text, WiFi password, contact info, etc.
3. Customize (optional): Change colors, add logo, adjust size
4. Download the QR code image (PNG or SVG format)
5. Test it with your smartphone before printing or publishing

Scanning QR codes is built into modern smartphones:

iPhone (iOS 11 and newer):

1. Open the Camera app
2. Point the camera at the QR code
3. Tap the notification banner that appears
4. The link or content will open

Android:

1. Open the Camera app or Google Lens
2. Point at the QR code
3. Tap the popup notification
4. Content opens automatically

Older devices: Download a free QR scanner app from the App Store or Google Play (search "QR Scanner" or "QR Reader").

Yes! QR codes are completely free to create and use. The technology is open and patent-free.

What's free:

• Generating unlimited static QR codes
• Using QR codes commercially or personally
• Printing QR codes on any materials
• Sharing QR codes publicly

What may cost money (optional):

• Dynamic QR codes: Editable after creation, with analytics ($5-50/month)
• Advanced features: Custom branding, bulk generation, API access
• White-label solutions: Remove "generated by" watermarks

For most use cases, free static QR codes are perfect!

QR codes can store many types of data:

🌐 Web & Digital:

• Website URLs: Link to your website, product page, or landing page
• Social media profiles: Instagram, Facebook, LinkedIn, Twitter
• App downloads: Direct link to App Store or Google Play
• YouTube videos: Link directly to videos or playlists

📞 Contact & Communication:

• vCard: Contact information (name, phone, email, address)
• Email: Pre-filled recipient, subject, and message
• Phone number: Instant dial without typing
• SMS: Pre-filled text message

🔐 Credentials & Technical:

• WiFi: Network name, password, and security type (auto-connect)
• Cryptocurrency: Bitcoin, Ethereum wallet addresses
• Authentication: Two-factor authentication setup
• Calendar events: Add events with date, time, location

💼 Business:

• Payment links: PayPal, Venmo, payment processors
• PDF documents: Menus, brochures, manuals
• Google Maps location: Directions to your business
• Reviews: Direct link to Google/Yelp reviews

Minimum QR code size depends on scanning distance:

Recommended sizes by use case:

• Business cards: 0.8 - 1 inch (2-2.5 cm)
• Flyers/brochures: 1 - 1.5 inches (2.5-4 cm)
• Posters (arm's length): 1.5 - 2 inches (4-5 cm)
• Store windows (6+ feet): 3 - 4 inches (8-10 cm)
• Billboards (30+ feet): 12+ inches (30+ cm)
• Digital screens: 20-30% of screen width

⚠️ Important: These are minimum sizes. Larger is always better for reliability. Always test at the intended viewing distance before mass production!

It depends on the type of QR code:

Static QR Codes (most common):

• Never expire - they're just images containing data
• Work forever once created
• No ongoing service required
• Can be printed and used indefinitely

⚠️ However... if your static QR code links to a URL:

• The URL could go offline or change
• The website could be taken down
• Domain could expire

Dynamic QR Codes:

• Can expire if you stop paying for the service
• Expire if the redirect service shuts down
• Require active subscription to keep working

QR code capacity depends on the data type and error correction level:

Maximum storage capacity:

• Numeric only: 7,089 characters
• Alphanumeric: 4,296 characters (letters, numbers, some symbols)
• Binary: 2,953 bytes
• Kanji/Kana: 1,817 characters

⚠️ Reality check:

• More data = larger, more complex QR code
• Complex codes are harder to scan
• Print quality must be higher for complex codes
• Damaged areas can prevent scanning

Static QR Codes:

• ✅ Free forever
• ✅ Permanent - never expire
• ✅ Privacy-friendly - no tracking
• ✅ Fast - direct connection
• ❌ Cannot be edited after creation
• ❌ No analytics - can't track scans

Best for: Business cards, product packaging, permanent signage, personal use

Dynamic QR Codes:

• ✅ Editable - change destination URL anytime
• ✅ Analytics - track scans, location, devices
• ✅ A/B testing - test different destinations
• ✅ Campaign management - organize multiple codes
• ❌ Costs money ($5-50/month)
• ❌ Requires service - stops working if subscription ends
• ❌ Slower - redirects through service

Best for: Marketing campaigns, temporary promotions, print materials you may want to update

Static QR codes (free): Cannot be tracked directly - they're just images.

Workarounds for tracking static QR codes:

1. URL shorteners: Use Bitly, TinyURL, or Rebrandly - they provide click analytics
2. UTM parameters: Add tracking codes to your URL (e.g., ?utm_source=qr_code&utm_campaign=poster)
3. Unique URLs: Create separate landing pages for each QR code campaign
4. Google Analytics: Track traffic from specific campaigns

Dynamic QR codes: Built-in tracking includes:

• Total number of scans
• Scan location (city/country)
• Device type (iPhone, Android, etc.)
• Operating system
• Time of scan
• Unique vs repeat visitors

Common problems and solutions:

1. Too small:

• Problem: QR code smaller than 0.8 inch (2 cm)
• Solution: Make it at least 1 inch for handheld scanning

2. Low contrast:

• Problem: Light colors on light background
• Solution: Use black on white or high-contrast colors

3. Poor print quality:

• Problem: Blurry, pixelated, or low-resolution print
• Solution: Use 300 DPI minimum, print from vector (SVG) if possible

4. Damaged or distorted:

• Problem: Wrinkled, torn, stretched, or curved surface
• Solution: Print on flat surfaces or use higher error correction

5. Environmental issues:

• Problem: Poor lighting, glare, reflective surface
• Solution: Use matte finish, improve lighting, angle to reduce glare

6. Over-customization:

• Problem: Too much color, logo too large, excessive styling
• Solution: Keep logo under 30% of code area, maintain contrast

Yes! You can customize QR codes while maintaining scannability.

✅ Safe customizations:

• Colors: Change foreground/background (maintain high contrast)
• Logo/image: Add in center (up to 30% of area)
• Shape: Round corners and modules
• Frame: Add border with call-to-action text
• Branding: Match your brand colors

⚠️ Rules for safe customization:

1. Maintain high contrast: Dark on light or vice versa
2. Limit logo size: Maximum 30% of QR code area
3. Avoid light colors: Pastels and light colors scan poorly
4. Don't invert: Light code on dark background is less reliable
5. Test thoroughly: Scan on multiple devices before printing

❌ Don't do this:

• Yellow on white background
• Complex gradient backgrounds
• Logo covering more than 30%
• Artistic distortions

🍽️ Restaurants & Hospitality:

• Digital menus (reduced print costs)
• Table ordering and payment
• Review requests (Google, Yelp)
• WiFi sharing
• Loyalty program signup

🛍️ Retail & E-commerce:

• Product information and instructions
• Special offers and coupons
• App downloads
• Customer reviews
• Social media follow links

🏢 B2B & Professional:

• Business card digital vCard
• Conference booth information
• Product catalogs
• Case studies and whitepapers
• LinkedIn profile links

🎓 Education & Events:

• Event registration
• Digital tickets
• Course materials
• Attendance tracking
• Feedback forms

🏠 Real Estate:

• Virtual property tours
• Listing details
• Contact agent directly
• Mortgage calculators