QR Code Types Explained

WiFi QR Codes: 네트워크 자격 증명을 즉시 공유

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How to create WiFi QR codes: the WIFI: URI scheme, security types, hidden networks, and placement strategies.

  
  

    
  








  
  

    
    
      
      
  1. 
        WiFi QR Codes: Share Network Credentials Instantly
      
    2. 
      
      
  2. 
        The WIFI URI Format
      
    3. 
      
      
  3. 
        Security Type Selection
      
    4. 
      
      
  4. 
        Creating WiFi QR Codes
      
    5. 
      
      
  5. 
        Placement Strategies
      
    6. 
      
      
  6. 
        Platform Compatibility
      
    7. 
      
      
  7. 
        Security Considerations
      
    8. 
      
      
  8. 
        Key Takeaways
      
    9. 
      
    

  









  
  

  
  

    
    

      
WiFi QR Codes: Share Network Credentials Instantly


WiFi QR codes encode network credentials in a standard format that smartphones can read and use to connect automatically — no manual password typing required.


The WIFI URI Format


WiFi QR codes use a structured string format:


WIFI:T:WPA;S:MyNetwork;P:MyPassword;;






Field
Description
Required






T
Security type: WPA, WPA2-EAP, WEP, nopass
Yes




S
Network name (SSID)
Yes




P
Password
Yes (except nopass)




H
Hidden network: true/false
No




E
EAP method
No (WPA2-EAP only)






Security Type Selection


    

  • WPA/WPA2/WPA3: Use T:WPA — covers all WPA variants
    • 

  • WEP: Use T:WEP — but WEP is obsolete and insecure, avoid if possible
    • 

  • Open network: Use T:nopass — no password field needed
    • 



Creating WiFi QR Codes


The SSID and password should be exact — case-sensitive and including any special characters. Special characters (;, :, \, ", ,) must be escaped with a backslash in the WIFI format.


Placement Strategies


Hotels and vacation rentals: Print the WiFi QR code on a card in each room. Guests scan once instead of typing a complex password.


Offices: Display at reception and meeting rooms. Separate QR codes for guest and internal networks.


Restaurants and cafes: Include on table cards or near the entrance. Combine with your URL QR code for your website.


Home: Attach to the router or a nearby surface for visiting guests.


Platform Compatibility






Platform
Support






iOS 11+
Native camera app




Android 10+
Native camera app




Older Android
Google Lens or third-party apps




Laptops
Requires QR scanner app






Security Considerations


WiFi QR codes contain your password in plain text — anyone who scans the code or sees the raw data gets your credentials. Mitigations:


    

  • Use a separate guest network with limited access
    • 

  • Rotate passwords periodically and reprint QR codes
    • 

  • Do not use your primary network credentials on public-facing QR codes
    • 

  • Consider WPA2-EAP with individual credentials for corporate environments
    • 



Key Takeaways


    

  • WiFi QR codes use the WIFI:T:;S:;P:;; format
    • 

  • Supported natively on iOS 11+ and Android 10+
    • 

  • Special characters in SSID or password must be escaped
    • 

  • Always use a guest network for public-facing WiFi QR codes
    • 

  • WPA/WPA2/WPA3 are all represented by T:WPA
    •