QR codes bridge the physical and digital worlds. A poster links to your app. A restaurant menu opens on a phone. A WiFi password shares without typing. QR codes handle all of these — and they're more robust than you might think, working even when partially damaged.
What Is QR Code Generator?
QR (Quick Response) codes encode data as a matrix of black and white squares readable by any smartphone camera. Our QR Code Generator creates codes for URLs, text, WiFi access, email addresses, and phone numbers with customizable styling.
How to Use QR Code Generator on DevToolHub
- Open the QR Code Generator tool on DevToolHub — no signup required.
- Paste or enter your input data in the left panel.
- See the result instantly in the output panel.
- Copy the result or download it as a file.
QR Code Data Formats
Different content types use different encoding patterns:
// URL (most common)
https://devtoolhub.com
// WiFi credentials (auto-connects on scan)
WIFI:T:WPA;S:NetworkName;P:Password123;;
// Email with subject
mailto:hello@example.com?subject=Hello
// Phone call
tel:+1234567890
// vCard contact
BEGIN:VCARD
VERSION:3.0
N:Doe;John
TEL:+1234567890
EMAIL:john@example.com
END:VCARD
// Error correction levels:
L (7%) → smallest QR code
M (15%) → standard
Q (25%) → good for printed materials
H (30%) → works even with logo overlayPro Tips
- Use high error correction (H) if you plan to place a logo in the center of the QR code
- Short URLs produce simpler, more scannable QR codes — use URL shorteners for long links
- Test QR codes at their actual print size — tiny codes may not scan on older phones
- Add a short text label below the QR code telling users what they'll get when scanning
When You Need This
- Adding QR codes to business cards linking to your portfolio
- Creating WiFi sharing codes for offices and events
- Generating QR codes for restaurant menus and print materials
- Building product packaging with links to user manuals
Free Tools Mentioned in This Article