- name
- qr-code-generator
- description
- Generate QR codes for URLs, text, WiFi credentials, contact cards, and more. Use when creating scannable links for marketing materials, sharing WiFi passwords, generating business cards, or creating quick access to digital content. Supports custom styling, error correction levels, and multiple export formats.
QR Code Generator
Create QR codes for URLs, WiFi, contacts, and more.
When to Use
- Creating scannable links for print materials
- Sharing WiFi credentials securely
- Generating digital business cards
- Creating quick app download links
- Sharing locations or maps
- Event check-in codes
Quick Start
Basic URL QR Code
import qrcode
def generate_qr(data, output_path='qr_code.png'):
"""Generate simple QR code"""
qr = qrcode.QRCode(
version=1,
error_correction=qrcode.constants.ERROR_CORRECT_L,
box_size=10,
border=4,
)
qr.add_data(data)
qr.make(fit=True)
img = qr.make_image(fill_color="black", back_color="white")
img.save(output_path)
return output_path
# Usage
generate_qr('https://example.com', 'website_qr.png')WiFi QR Code
def generate_wifi_qr(ssid, password, security='WPA', output='wifi_qr.png'):
"""
Generate WiFi connection QR code
Format: WIFI:S:ssid;T:security;P:password;;
"""
wifi_string = f"WIFI:S:{ssid};T:{security};P:{password};;"
return generate_qr(wifi_string, output)
# Usage
generate_wifi_qr('MyHomeNetwork', 'secret123', 'WPA')
# Scan to auto-connect to WiFiContact Card (vCard)
def generate_vcard_qr(name, phone, email, output='contact_qr.png'):
"""Generate vCard QR code"""
vcard = f"""BEGIN:VCARD
VERSION:3.0
FN:{name}
TEL:{phone}
EMAIL:{email}
END:VCARD"""
return generate_qr(vcard, output)
# Usage
generate_vcard_qr('John Doe', '+1234567890', 'john@example.com')Styled QR Code
def generate_styled_qr(data, output='styled_qr.png', **kwargs):
"""Generate QR with custom styling"""
qr = qrcode.QRCode(
version=kwargs.get('version', 1),
error_correction=getattr(
qrcode.constants,
f"ERROR_CORRECT_{kwargs.get('error_correction', 'M')}"
),
box_size=kwargs.get('box_size', 10),
border=kwargs.get('border', 4),
)
qr.add_data(data)
qr.make(fit=True)
# Custom colors
fill_color = kwargs.get('fill_color', 'black')
back_color = kwargs.get('back_color', 'white')
img = qr.make_image(fill_color=fill_color, back_color=back_color)
img.save(output)
return output
# Styled examples
generate_styled_qr('https://mysite.com', 'blue_qr.png',
fill_color='blue', back_color='lightblue')Error Correction Levels
| Level | Correction | Use Case |
|---|---|---|
| L | ~7% | Clean environments |
| M | ~15% | Default, good balance |
| Q | ~25% | Dirty/damaged possible |
| H | ~30% | Logos/overlays on QR |
Advanced Features
Batch Generate
def batch_generate(urls, output_dir='./qr_codes'):
"""Generate QR codes for multiple URLs"""
import os
os.makedirs(output_dir, exist_ok=True)
generated = []
for i, url in enumerate(urls, 1):
output = f"{output_dir}/qr_{i:03d}.png"
generate_qr(url, output)
generated.append(output)
return generated
# Usage
urls = [
'https://product1.com',
'https://product2.com',
'https://product3.com'
]
batch_generate(urls)Add Logo to Center
from PIL import Image
def add_logo_to_qr(qr_path, logo_path, output_path):
"""Add logo to center of QR code"""
qr_img = Image.open(qr_path)
logo_img = Image.open(logo_path)
# Resize logo to fit in center
box_size = min(qr_img.size) // 5
logo_img = logo_img.resize((box_size, box_size))
# Calculate position
pos = ((qr_img.size[0] - box_size) // 2,
(qr_img.size[1] - box_size) // 2)
# Paste logo
qr_img.paste(logo_img, pos, logo_img if logo_img.mode == 'RGBA' else None)
qr_img.save(output_path)Dependencies
pip install qrcode[pil]