QR Code 生成器
快速生成 QR Code，支持网址、文字、WiFi 等多种内容。
输入内容后，QR Code 将显示在这里
使用示例
https://example.comtel:+1234567890mailto:hello@example.comWIFI:T:WPA;S:NetworkName;P:Password;;sms:+1234567890:Hello!geo:40.7128,-74.0060使用方法
输入数值
在输入栏中填入您的数字或参数。
即时获取结果
结果在您输入时自动更新——无需按计算按钮。
复制或保存
将结果复制到剪贴板或用于您的工作流程。
为什么使用此工具
100% 免费
没有隐藏费用，没有付费等级——所有功能完全免费。
无需安装
完全在浏览器中运行。无需下载或安装任何软件。
隐私且安全
您的数据永远不会离开您的设备。不会上传至任何服务器。
支持移动设备
完全响应式设计——在手机、平板或桌面电脑上均可使用。
QR Code Generation: Structure, Standards, and Best Practices
Key Takeaways
- QR codes can store up to 4,296 alphanumeric characters with built-in error correction that allows scanning even when partially damaged.
- QR codes support multiple data types: URLs, text, WiFi credentials, vCards, calendar events, and more.
- All QR code generation happens in your browser — your data is never sent to any external server.
QR (Quick Response) codes have evolved from their origins in Japanese automotive manufacturing to become a universal bridge between physical and digital worlds. From restaurant menus and payment systems to event tickets and product packaging, QR codes enable instant information access with a smartphone camera scan. Understanding QR code best practices ensures your codes are scannable, secure, and effective.
Global QR code usage increased by over 400% between 2020 and 2024, driven by contactless interactions.
Growth Trend
Common Use Cases
URL Sharing
Encode website URLs for print materials, business cards, and signage — allowing instant access without typing long web addresses.
Contact Information (vCard)
Encode name, phone, email, and address in vCard format so contacts can be saved to a phone with a single scan.
WiFi Network Sharing
Encode WiFi credentials (SSID, password, encryption type) to allow guests to connect to your network by scanning a code.
Two-Factor Authentication Setup
Generate TOTP provisioning QR codes for authenticator apps like Google Authenticator and Authy using the otpauth:// URI scheme.
Pro Tips
Use the lowest error correction level (L = 7%) for digital displays and the highest (H = 30%) for printed materials that may get damaged.
Maintain adequate quiet zone (white border) around the QR code — at least 4 modules wide for reliable scanning.
Test your QR codes with multiple scanner apps and devices before deploying to production.
For URLs, use a URL shortener to reduce data density and create smaller, more easily scannable QR codes.
All QR code generation is performed entirely in your browser. The data you encode is never transmitted to any external server, ensuring privacy for sensitive content like WiFi passwords and contact information.