📱 QR Code Generator

Quickly generate and download QR codes

Operations

Settings

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📖 User Guide

Free online QR code generator - Quick QR Code generation and download

⚡ Quick Start

Three steps to generate QR code:

1
Input Content

Enter website URL, phone, or other content in the text box

2
Click Generate

Click the "Generate QR Code" button

3
Download or Share

Click "Download" to get the image or share

📱 Basic Operations

Generate QR Code
  • Input Content: Supports any text, including:
    • Website: https://example.com
    • Phone: tel:+1-555-123-4567
    • Email: mailto:name@example.com
    • WiFi: WiFi connection info
    • Plain text: Any text
    • Multi-language: Fully supported
  • Click Generate: Instantly generates corresponding QR code
  • Real-time Encoding: Needs to click generate again after editing text
Size Adjustment
  • Slider Range: 100px to 400px
  • Real-time Preview: QR code updates as you adjust size
  • Size Recommendations:
    • 100-150px: Small size, suitable for document embedding
    • 200-300px: Standard size, suitable for printing and screen display
    • 300-400px: Large size, suitable for long-distance scanning
Download Feature
  • Format: PNG format, transparent background
  • File Name: Auto-named as qrcode.png
  • Use: Printing, website embedding, sharing
  • Quality: Lossless save, no impact on scan accuracy

🎓 QR Code Knowledge

What is QR Code?
  • Full Name: Quick Response Code
  • Features: 2D barcode, quick information recognition
  • Capacity: Can encode up to 4296 characters
  • Application: Widely used in business, marketing, payments
QR Code Structure
  • Position Pattern: Special pattern in four corners, helps recognize direction
  • Data Area: Black and white dots in the middle, encode actual content
  • Error Correction: Allows partial QR code damage yet still recognizable
  • White Border: White border around four sides, improves recognition
Scanning Compatibility
  • Universal Support: All modern phones can scan
  • No App Needed: Most phone systems have built-in support
  • Quick Recognition: Average scan time < 1 second
  • Damage Tolerance: Up to 30% damage still recognizable

💼 Practical Scenarios

Marketing and Promotion
  • Place QR code on advertisement posters linking to campaign pages
  • Print QR code on business cards for quick contact info saving
  • Product packaging with QR code linking to product video
Information Sharing
  • WiFi QR code: No need to manually enter password
  • Contact info: Quickly add to address book
  • Calendar event: Directly import to calendar app
Documents and Payment
  • Receipt with QR code linking to invoice details
  • Payment QR code for online transactions
  • Document tracking, QR code links to file server

❓ Frequently Asked Questions

Q: How much content can QR code encode?

A: Maximum 4296 characters. Chinese, URLs all supported. More content means denser QR code, recommend increasing size.

Q: What format is the generated QR code?

A: PNG format, transparent background, can be used directly on web, printing or WeChat sharing.

Q: Does QR code expire?

A: No. Generated QR codes are valid forever, but if the linked server goes offline, the link fails.

Q: Can still scan if QR code is damaged?

A: Yes. QR code has error correction, about 30% damage still recognized correctly.

Q: Can I generate dynamic QR codes?

A: This tool generates static QR codes. Dynamic QR codes need backend support, can be done on other platforms.

📚 Generation Examples

Website Link

Input: https://example.com

Use: Marketing promotion, traffic drive

Phone Number

Input: tel:+1-555-123-4567

Use: Quick dial

Email Address

Input: mailto:name@example.com

Use: Quick email send

Plain Text

Input: Any text content

Use: Information encoding, archive

💡 Usage Tips

  • Appropriate Size Adjustment: At least 100x100px for printing, smaller possible for screen
  • White Border Important: Don't crop the white border around QR code, keep at least 4 units
  • Contrast Priority: Don't change black/white colors, ensure clarity
  • Test Scan: After generation, scan with phone to test
  • Multi-format Support: Generated image can be pasted into various applications
  • Completely Local Processing: All generation happens in browser, no server upload