QR Code Generator: Complete Guide to Free Multi-Format QR Code Creation Tool
Use our free QR Code generator supporting text, URL, WiFi, phone, SMS, email, vCard, payment, calendar and more formats. Customize colors, size and style with instant preview and download.
What is a QR Code Generator?
A QR Code generator is a powerful online tool that can quickly create various types of QR codes. Whether you need to share URLs, contact information, WiFi passwords, or any other information, our tool can help you easily create professional QR codes.
Why Do You Need QR Codes?
In the digital age, QR codes have become an important tool for information sharing:
- Quick Sharing - Scan to get information instantly, no manual input required
- Space Saving - Store large amounts of information in limited space
- Improved Efficiency - Reduce errors and time costs
- Cross-platform Compatibility - All smartphones can scan
- Eco-friendly - Reduce paper usage
Features of Our QR Code Generator
🎨 Multiple Format Support
Our tool supports 9 different QR code formats:
1. Text QR Code
The simplest QR code type that can contain any text content:
- Plain text messages
- Multi-line text
- Special characters and emojis
- Multi-language text
2. URL QR Code
Quickly share website links:
- Automatically adds http:// or https:// prefix
- Supports long URLs
- Can be opened directly in browser
3. WiFi QR Code
Let visitors quickly connect to WiFi networks:
- Supports WPA, WEP, no password and other security types
- Includes network name (SSID) and password
- Hidden network support
- One-scan connection, no manual input needed
4. Phone QR Code
Quickly make phone calls:
- Supports international phone number formats
- Automatically adds tel: prefix
- Direct dialing after scanning
5. SMS QR Code
Pre-fill SMS content:
- Includes recipient phone number
- Default SMS content
- Opens SMS app directly after scanning
6. Email QR Code
Quickly send emails:
- Pre-fill recipient address
- Default subject and content
- Supports multiple recipients
7. Business Card QR Code (vCard)
Digitize personal or business information:
- Name, title, company
- Phone, email, website
- Address information
- Directly saves to contacts after scanning
8. Mobile Payment QR Code
Supports various mobile payment methods:
- LINE Pay
- Apple Pay
- Google Pay
- Includes amount information
9. Calendar Event QR Code
Share event information:
- Event title and description
- Start and end time
- Event location
- Directly adds to calendar after scanning
Custom Style Features
🎨 Color Customization
You can completely customize the appearance of QR codes:
- Foreground Color - QR code pattern color
- Background Color - Background color
- Color Picker - Intuitive color selection interface
- Hex Color Codes - Supports precise color settings
📏 Size Adjustment
Flexible size options:
- Minimum size: 100x100 pixels
- Maximum size: 1000x1000 pixels
- Default size: 300x300 pixels
- Suitable for various use cases
🔧 Advanced Settings
Professional QR code parameter adjustment:
- Error Correction Level - Four levels: L, M, Q, H
- Margin Settings - Adjustable 0-50 pixels
- Real-time Preview - See effects immediately when modifying
How to Use the QR Code Generator
Step 1: Choose QR Code Type
Select the appropriate QR code type based on your needs. Each type has detailed descriptions and examples to help you quickly understand its purpose.
Step 2: Enter Content
Enter the corresponding content based on the selected type:
- Text - Directly input text content
- URL - Enter complete URL
- WiFi - Enter network name, password and security type
- Contact Info - Fill in name, phone, email, etc.
Step 3: Customize Style
Adjust the appearance of the QR code:
- Choose foreground and background colors
- Set appropriate size
- Adjust error correction level
- Set margin size
Step 4: Generate and Download
Click the generate button to:
- Preview QR code in real-time
- Download PNG format image
- Copy image to clipboard
- Share with others
Error Correction Level Explanation
The error correction level of QR codes determines their fault tolerance:
Level L (about 7% fault tolerance)
Suitable for:
- Clean environments
- High-quality printing
- QR codes with less content
Level M (about 15% fault tolerance)
Suitable for:
- General use cases
- Standard print quality
- Balance between size and fault tolerance
Level Q (about 25% fault tolerance)
Suitable for:
- Outdoor use
- Potentially damaged environments
- Occasions requiring higher fault tolerance
Level H (about 30% fault tolerance)
Suitable for:
- Harsh environments
- Potentially partially blocked
- Highest fault tolerance requirements
QR Code Best Practices
Content Optimization
- Concise and Clear - Content should be concise and easy to understand
- Test Scanning - Test scanning after generation
- Backup Plan - Provide text backup information
- Regular Updates - Update QR codes when content changes
Design Recommendations
- Contrast - Ensure sufficient contrast between foreground and background
- Appropriate Size - Choose suitable size based on use case
- Adequate Margins - Maintain appropriate margins
- Avoid Over-decoration - Maintain QR code readability
Use Cases
- Restaurant Menus - Provide digital menu links
- Event Promotion - Share event details and registration links
- Product Packaging - Provide product information and instructions
- Business Card Design - Quickly share contact information
- WiFi Sharing - Let visitors quickly connect to network
Frequently Asked Questions
Q: How much content can a QR code contain?
A: QR code capacity depends on error correction level and version:
- Numeric: up to 7,089 characters
- Alphanumeric: up to 4,296 characters
- Binary: up to 2,953 bytes
- Japanese Kanji: up to 1,817 characters
Q: Can QR codes be customized with logos?
A: Our tool currently focuses on standard QR code generation. Adding logos requires special design techniques, we recommend using professional QR code design software.
Q: Do QR codes expire?
A: QR codes themselves don't expire, but content may change. If the URL pointed to by the QR code becomes invalid or content is updated, regeneration is needed.
Q: How to ensure QR code scanning success rate?
A: Recommendations:
- Use appropriate error correction level
- Ensure sufficient contrast
- Avoid overly small sizes
- Use on clean backgrounds
Technical Specifications
Supported Formats
- Output format: PNG
- Color mode: RGB
- Transparency: Supported
- Compression: Lossless compression
Size Specifications
- Minimum size: 100x100 pixels
- Maximum size: 1000x1000 pixels
- Recommended size: 300x300 pixels
- DPI: 72 (suitable for screen display)
Compatibility
- All smartphones
- Tablets
- QR code scanning apps
- Camera apps
Privacy and Security
We value your privacy:
- Local Generation - QR codes are generated in your browser
- No Data Storage - Your content is not stored
- Real-time Processing - All processing is done locally
- Secure Transmission - Uses HTTPS encryption
Advanced Usage Tips
Batch Generation
If you need to generate multiple QR codes:
- Prepare content list
- Use same style settings
- Batch download and organize
Brand Consistency
Create brand QR codes:
- Use brand colors
- Unified style settings
- Create usage guidelines
Tracking and Analytics
For URL QR codes:
- Use URL shortening services
- Add UTM parameters
- Track scanning statistics
Conclusion
Our QR code generator provides you with a feature-complete, easy-to-use QR code generation solution. Whether you are an individual user or business user, you can find suitable features:
- Supports 9 different QR code formats
- Fully customizable style options
- Real-time preview and quick download
- High-quality PNG output
- Completely free to use
Start using our QR code generator and make information sharing simpler and more efficient! Whether sharing contact information, WiFi passwords, or promoting your website, QR codes are the best solution.