QR Code Generator
Create QR codes for any content - completely free!
QRコード生成
スタイルオプション
プレビュー
📱
QRコードにする内容を入力すると
ここにプレビューが表示されます。
Other Utilities
What is a QR Code?
QR Code (Quick Response Code) is a two-dimensional barcode developed by Denso Wave in Japan in 1994. It can store much more information than traditional barcodes and can be easily scanned by smartphone cameras.
Supported QR Code Types
| Type | Use Case | Example |
|---|---|---|
| Text | Plain text information | Notes, serial numbers |
| URL | Website links | Websites, app downloads |
| WiFi | Auto-connect to WiFi | Cafe, hotel WiFi sharing |
| Open email composer | Contact forms, feedback | |
| Phone | Make a call | Customer service, business cards |
| SMS | Compose text message | Event registration, surveys |
QR Code Design Tips
- High contrast: Ensure good contrast between foreground and background colors
- Proper size: Minimum 2cm x 2cm recommended for print
- Quiet zone: Leave margin space around the QR code
- Test first: Scan with multiple devices before publishing
FAQ
Q. Are the QR codes permanent?
Yes, once created, QR codes are permanent. However, for URL QR codes, if the website goes offline, the link won't work.
Q. Can I use custom colors?
Yes! As long as there's sufficient contrast between foreground and background, the QR code will scan properly. The foreground should be darker than the background.
