How to Generate a QR Code (Free, No Signup)
QR codes encode data into a scannable pattern that any smartphone camera can read. They're used for URLs, Wi-Fi login credentials, restaurant menus, contact cards, event tickets, and payment links. Generating one takes seconds and requires no technical knowledge.
- Create QR codes for URLs, text, Wi-Fi networks, and contact cards.
- What Can a QR Code Encode?.
- Covers customizing qr code appearance.
- Covers download format and size.
- Covers testing your qr code.
What Can a QR Code Encode?
URLs are the most common use case, but QR codes can encode any text up to about 4,296 characters. Special prefixes trigger device actions: 'WIFI:S:MyNetwork;T:WPA;P:mypassword;;' auto-connects to Wi-Fi. 'tel:+15551234567' opens the phone dialer. 'mailto:email@example.com' opens the email client. 'BEGIN:VCARD...' adds a contact card. The QR Code Generator supports all these formats with guided input fields.
Customizing QR Code Appearance
While black-on-white is the most reliable, QR codes can be customized with brand colors, rounded dot styles, and embedded logos. The key constraint is contrast — the dark modules must have at least 40% contrast against the light modules. Avoid very light colors for the dark pattern and very dark colors for the background. When adding a logo, keep it under 20% of the QR code's area to preserve scannability. The error correction level should be set to High (H) when using a logo overlay.
Download Format and Size
For print materials (business cards, posters, packaging), download as SVG — it scales to any size without pixelation. For digital use (websites, emails, social media), PNG at 512×512 or 1024×1024 is sufficient. The minimum print size for reliable scanning is about 2cm × 2cm (0.8 × 0.8 inches). For scanning at a distance, increase the size proportionally — a QR code on a poster should be at least 10cm × 10cm.
background-size animation or @property registered custom properties instead.Testing Your QR Code
Always test a QR code before printing or distributing. Scan it with at least two different phones (iOS and Android). Test in low light and at an angle. If the QR code encodes a URL, verify the destination loads correctly. QR codes are permanent once printed — a broken URL means a useless QR code. Consider using a URL shortener with analytics so you can track scans and update the destination if needed.