QR Code Generation Guide
Our QR code generator creates scannable QR codes for any text or URL directly in your browser. QR codes (Quick Response codes) are two-dimensional barcodes that any smartphone camera can scan, making them powerful tools for sharing URLs, contact information, Wi-Fi credentials, and more without requiring users to type anything.
How QR Codes Work
A QR code encodes data in a square grid of black and white modules. The code includes error correction (at four levels: L, M, Q, H) that allows it to be scanned even if up to 30% of the code is damaged or obscured. The finder patterns (three large squares in the corners) help scanners orient the code correctly at any angle.
What Can You Encode in a QR Code?
URLs: The most common use — link directly to any website. Plain text: Notes, messages, or any string of characters. Wi-Fi credentials: Format: WIFI:T:WPA;S:YourSSID;P:YourPassword;; — lets people join your network by scanning. Email: Pre-fill a compose window with recipient, subject, and body. Phone numbers: Start a call directly. vCard: Share contact information. SMS: Pre-fill a text message.
QR Code Best Practices
Always test your QR code with multiple devices before printing or distributing. Use high-contrast colors (dark on light) for maximum scannability. Ensure the QR code is large enough — at least 2cm × 2cm for print. Include a quiet zone (white border) of at least 4 modules around the code. Use URL shorteners for very long URLs to keep code density manageable.
Using Our Free QR Code Generator
Enter any text or URL, customize foreground and background colors, and your QR code generates instantly. Download it as a high-resolution PNG. All generation happens in your browser — no server, no account, no limit.
Frequently Asked Questions
What can I encode in a QR code?
Any text or URL. Common uses: website links, Wi-Fi credentials (WIFI:T:WPA;S:SSID;P:Password;;), contact info (vCard), phone numbers, email addresses, SMS messages, and plain text notes.
Can I customize the QR code colors?
Yes. Choose any foreground and background color. For best scannability, maintain high contrast — dark foreground on a light background. Avoid low-contrast combinations like light gray on white.
How large should a QR code be for printing?
At minimum 2cm × 2cm (about 0.8 inches square) for close-range scanning. For outdoor signage or scanning from a distance, scale up proportionally — 1 meter of scanning distance requires roughly 1cm of QR code size.
Can I edit a QR code after creating it?
No. A QR code encodes its data permanently. To change the destination, you need to generate a new QR code. For flexible link management, use a URL shortener that lets you update the destination without reprinting the code.