← Hashito System Home 日本語 Tools Blog
Event details
320px
4
Preview
Scanning with a VEVENT-capable QR reader opens the add-to-calendar screen. Support varies by device and app.
Text embedded in the QR code

        

        

          
          Related tools:
          
    
            
  • ICS File Generator Build an ICS (iCalendar) file from a title, date, time and location.
    • 
            
  • QR Code Analyzer Upload a QR code to analyze and display detailed information such as its error-correction level, version, and mask pattern.
    • 
            
  • QR Code Generator Generate QR codes from URLs or text.
    • 
            
  • QR Code Photo Restore Auto-repair QR codes that won't scan: the module grid is estimated from the finder patterns and every module is repainted by majority vote.
    • 
            
  • QR Code EC Tester Visually test the limits of each error-correction level by masking parts of a QR code to find its readable boundary.
    • 
            
  • Email QR Code Generator Generate a mailto QR code from an address, subject and body.
    • 
          

          
          
        

      

    

  


  

    
How to make a calendar event QR code (3 steps)

    
    
      
  1. Enter the event title — the name shown in the calendar. It becomes the VEVENT SUMMARY.
    2. 
      
  2. Add the start/end time and location — check all-day to switch to date-only input. The location is embedded as LOCATION.
    3. 
      
  3. Save as PNG or SVG and share it — put it on invitations, posters or slides so people can add the event on the spot.
    4. 
    

  


  

    
Settings explained

    
What each setting means and how to use it. Click to expand.

    
About the iCalendar (VEVENT) format
This tool puts an iCalendar event block, from BEGIN:VEVENT to END:VEVENT, straight into the QR code. It consists of SUMMARY (title), DTSTART (start), DTEND (end), LOCATION and DESCRIPTION. The generated text is shown in the preview so you can check exactly what is embedded.

    
All-day event
When checked, the event uses a date-only form (DTSTART;VALUE=DATE:20260805) instead of a date and time. Use it for anniversaries, deadlines or event days without a time. Uncheck it to return to the timed form.

    
Wrap in VCALENDAR
By default only the VEVENT block goes into the QR code. When checked, it is wrapped in BEGIN:VCALENDAR, VERSION:2.0 and PRODID, with a per-event UID and a DTSTAMP creation time added, producing a complete iCalendar object. The data gets slightly larger, but some reader apps that cannot handle a bare VEVENT can add it.

    
Symbols and line breaks
iCalendar uses commas, semicolons and backslashes as delimiters, so they are escaped automatically when they appear in your input. Line breaks in the description are stored as \n. This keeps your text meaning intact; you do not need to do anything.

    
Error correction / size / margin
The error correction level is roughly how much of the code can be damaged and still be read (L about 7%, M about 15%, Q about 25%, H about 30%). More event text makes the QR code denser, so for print use a larger size or a shorter description. The margin is the white border around the code; the standard recommends at least 4 modules.

  


  

    
Frequently Asked Questions (FAQ)

    
What is a calendar event QR code?
It is a QR code that packs an event title, date, time and location into the iCalendar VEVENT format. When scanned with a compatible reader app, it opens the add-to-calendar screen with those details filled in. Put it on invitations or posters so attendees can save the event.

    
Does it work the same on every device?
No. VEVENT support depends on the reader app and device: some open an add-to-calendar screen, others only show the text. Test it on the devices your audience uses before distributing it.

    
Is the event information I enter sent anywhere?
No. Everything from input to QR generation and download runs in JavaScript inside your browser. Your event details are never sent to a server.