QR Code Generator
📱 What is a QR Code?
QR codes (Quick Response codes) are two-dimensional barcodes that can store various types of data. Originally developed in 1994 by Denso Wave for the automotive industry, they've since become ubiquitous in marketing, payments, and everyday information sharing. Unlike traditional barcodes that store data in one dimension, QR codes encode information both horizontally and vertically, allowing them to hold significantly more data.
This generator lets you create QR codes for multiple data types including plain text, URLs, contact information (vCards), WiFi network credentials, emails, phone numbers, and SMS messages. All processing happens directly in your browser—no data is ever sent to any server.
⚙️ How This Tool Works
Our QR code generator uses the industry-standard Reed-Solomon error correction algorithm, ensuring your codes remain scannable even when partially obscured or damaged. The tool runs entirely in WebAssembly, delivering native-speed performance right in your browser.
🔥 Key Features:
- Multiple Data Types: Support for Text, URL, vCard, WiFi, Email, Phone, and SMS formats
- Customizable Error Correction: Choose from Low (7%), Medium (15%), Quartile (25%), or High (30%) recovery levels
- Color Customization: Pick any foreground and background colors to match your brand
- Flexible Output: Download as scalable SVG or rasterized PNG
- Real-time Preview: See your QR code update instantly as you type
- Privacy First: All processing happens locally—your data never leaves your device
📊 Error Correction Levels Explained
QR codes include redundant data that allows them to be read even when partially damaged. Choosing the right error correction level depends on your use case:
Low (L) - 7% Recovery
Best for: Digital displays, clean environments, maximum data capacity
Use when the QR code will be displayed on screens or printed in controlled conditions where damage is unlikely.
Medium (M) - 15% Recovery
Best for: General purpose, good balance of size and reliability
The default choice for most applications. Offers a reasonable trade-off between data capacity and damage tolerance.
Quartile (Q) - 25% Recovery
Best for: Printed materials, outdoor use, moderate wear expected
Choose this when printing on materials that might get folded, scratched, or exposed to weather.
High (H) - 30% Recovery
Best for: Industrial use, harsh environments, logo overlays
Maximum redundancy. Essential when adding a logo to the center of your QR code or in industrial settings with potential damage.
📋 Supported Data Types
📝 Plain Text
Encode any text content. Perfect for simple messages, serial numbers, product codes, or any arbitrary string data.
🔗 URL
Link directly to websites. When scanned, most devices will offer to open the URL in a browser. Always include the protocol (https://) for best compatibility.
👤 vCard (Contact)
Create digital business cards. Include name, phone, email, organization, title, website, and address. When scanned, the contact is ready to save with a single tap.
📶 WiFi Network
Share WiFi credentials without typing passwords. Supports WPA/WPA2, WEP, and open networks. Perfect for guest access, cafes, or home automation.
✉️ Email
Pre-compose emails with recipient, subject, and body. Scanning opens the email client ready to send—great for feedback forms or contact requests.
📞 Phone Number
Dial numbers instantly. Scanning prompts the user to call the number. Useful for business cards, support lines, or emergency contacts.
💬 SMS Message
Pre-fill text messages. Specify the recipient number and message content. Ideal for SMS shortcodes, voting, or customer engagement campaigns.
💼 Practical Use Cases
1. 🏢 Business & Marketing
- Business Cards: vCard QR codes let contacts save your info instantly without manual typing
- Product Packaging: Link to manuals, registration, or promotional content
- Event Tickets: Encode booking references for quick check-in
- Promotional Materials: Drive traffic to landing pages, social media, or app stores
2. 🏠 Home & Personal
- WiFi Sharing: Print a QR code near your router for guests to connect easily
- Contact Sharing: Share your phone number at meetups or conferences
- Smart Home: Label devices with setup instructions or network info
3. 💻 Development & Testing
- App Deep Links: Test URL schemes and universal links on mobile devices
- Configuration: Encode JSON or other data for quick device setup
- Debugging: Share localhost tunnel URLs with teammates
4. 🎓 Education & Events
- Resource Links: Add QR codes to presentations or handouts for additional materials
- Attendance: Create check-in codes for events or classes
- Interactive Displays: Link museum exhibits or posters to multimedia content
🎨 Design Best Practices
- Maintain Contrast: Dark modules on light background works best. Avoid similar colors or gradients that reduce contrast.
- Size Matters: Ensure the QR code is large enough for reliable scanning. Minimum 2cm × 2cm for print, larger for distance scanning.
- Quiet Zone: Keep margin (quiet zone) enabled to help scanners detect the code boundaries.
- Test Before Printing: Always scan your QR code with multiple devices before mass production.
- Choose SVG for Print: Vector format scales infinitely without quality loss—ideal for print materials.
- Use PNG for Web: Raster format with fixed dimensions works well for digital displays and social media.
❓ Frequently Asked Questions
Q: How much data can a QR code hold?
A: Maximum capacity depends on the content type and error correction level. Numeric data: up to 7,089 characters. Alphanumeric: up to 4,296 characters. Binary/UTF-8: up to 2,953 bytes. Higher error correction reduces capacity.
Q: Will my QR code work on all phones?
A: Yes, modern smartphones (iOS 11+ and Android 8+) can scan QR codes directly with the camera app. Older devices may require a dedicated scanner app. vCard, WiFi, and email formats are universally supported.
Q: Can I add a logo to my QR code?
A: This tool generates standard QR codes. To add a logo, download the SVG and overlay your logo in a graphics editor. Use High error correction (30%) to ensure the code remains scannable with a centered logo.
Q: Do QR codes expire?
A: Static QR codes (like those generated here) never expire. The encoded data is permanent. However, if you encode a URL, the destination website could change or go offline.
Q: Is my data private?
A: Absolutely. All QR code generation happens in your browser using WebAssembly. No data is transmitted to any server. Your WiFi passwords, contact information, and other sensitive data stay on your device.
Q: Why choose SVG over PNG?
A: SVG is vector-based and scales to any size without losing quality—perfect for print. PNG is rasterized at a fixed resolution, better for web use where file size and broad compatibility matter.
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Data Type
Input Data
QR Code Settings
Enter data above to generate QR code
- Higher error correction allows QR codes to remain scannable even when partially damaged
- Keep good contrast between foreground and background colors for reliable scanning
- WiFi QR codes work with most smartphone cameras for instant network connection
- vCard QR codes are perfect for business cards and contact sharing