L=7% M=15% Q=25% H=30% recovery
📍 Data is encoded in the URL. Anyone with the link can view it.
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Get up and running in 30 seconds
Type or paste any text, URL, contact information, or data you want to encode. QR codes support URLs, plain text, vCards, WiFi credentials, phone numbers, and more.
Adjust size (128px to 1024px), error correction level (L, M, Q, H), colors (foreground and background), and add a logo or custom image in the center for branded QR codes.
Click 'Generate' to instantly create your QR code. The code appears in real-time as an SVG or PNG image, optimized for both screen display and print quality.
Download as PNG, SVG, or PDF for printing on business cards, posters, or packaging. Copy the image or share the QR code directly for digital use on websites, emails, or social media.
Understanding 2D barcodes for contactless interaction
QR (Quick Response) codes are two-dimensional barcodes invented by Denso Wave in 1994 for tracking automotive parts in Japan. Unlike traditional linear barcodes that store data horizontally, QR codes store information both horizontally and vertically, allowing them to hold significantly more data - up to 4,296 alphanumeric characters or 7,089 numeric characters.
QR codes have evolved from industrial use to ubiquitous consumer technology. Smartphones' native camera apps can scan QR codes without additional apps, driving mass adoption for contactless menus, payment systems, authentication, product tracking, and marketing campaigns.
Mobile app deep linking relies on QR codes to direct users to specific app pages or trigger app downloads. Conference badges use QR codes for instant attendee check-in and contact sharing. Product packaging embeds QR codes for authenticity verification, usage instructions, and warranty registration.
Payment systems (PayPal, Venmo, crypto wallets) generate QR codes for transaction requests - users scan to complete payments without manual data entry. Two-factor authentication (2FA) apps like Google Authenticator use QR codes to transfer TOTP secrets from services to user devices securely.
WiFi networks encode credentials in QR format (SSID, password, encryption type) for instant guest connectivity without sharing passwords verbally. Event tickets, boarding passes, and venue entries use QR codes for contactless scanning and real-time validation.
URL Encoding: Most common use case. Encodes https:// links for websites, landing pages, app downloads, or tracking URLs. Modern cameras automatically open links after scanning.
vCard Format: Stores contact information (name, phone, email, address, company) in structured format. Scanning adds contact directly to phone's address book.
WiFi Credentials: Special format: WIFI:T:WPA;S:NetworkName;P:Password;; enables instant network joining without manual password entry.
SEPA/Bitcoin Payment: Encodes payment requests with amount, recipient, and memo. Wallet apps parse and pre-fill transaction details.
How developers use QR codes daily
Restaurants place QR codes on tables - customers scan to view menus, order, and pay without physical contact. Became essential during COVID-19 and remains popular for convenience and reduced printing costs.
Embed unique QR codes on product packaging for authenticity verification, serial number lookup, warranty registration, and supply chain tracking. Luxury brands use QR codes to combat counterfeiting.
Generate unique QR codes for event tickets, conference badges, and venue access passes. Scanning validates tickets instantly, prevents duplicate entries, and enables real-time attendance tracking.
Create QR codes containing WiFi credentials - guests scan to connect instantly without typing passwords. Especially useful for complex passwords, guest networks, and Airbnb rentals.
Master QR code generation and customization
This QR code generator creates customizable, high-quality QR codes entirely in your browser using client-side JavaScript. No server uploads - your data stays private.
Enter your content (URL, text, phone number, etc.) in the input field and click "Generate". The QR code appears instantly as a scalable image. Default settings (medium error correction, black foreground, white background) work for most use cases.
Error correction determines how much damage a QR code can sustain while remaining scannable:
L (Low - 7% recovery): Smallest QR code size, best for clean environments (digital screens, high-quality prints). Not recommended for outdoor use or small sizes.
M (Medium - 15% recovery): Default and recommended for most applications. Good balance between size and reliability. Suitable for business cards, posters, product labels.
Q (Quartile - 25% recovery): Higher redundancy, slightly larger code. Recommended when adding logos/images to QR codes or printing on textured surfaces.
H (High - 30% recovery): Maximum error correction, largest code size. Use for outdoor signage, heavily customized designs, or harsh environments (construction sites, outdoor events).
Size: Choose 128px for small digital uses (email signatures), 256-512px for standard applications (websites, documents), 1024px+ for large format printing (posters, banners).
Colors: Customize foreground (typically black) and background (typically white) colors. Maintain high contrast ratio (>4.5:1) for reliable scanning. Dark foreground on light background works best.
Logo/Image: Add center logo using H error correction level. Logo should occupy <30% of QR code area to maintain scannability. Upload transparent PNG for best results.
PNG: Raster image, best for digital use (websites, emails, social media). Choose high resolution (1024px) for printing to maintain quality.
SVG: Vector format, infinitely scalable without quality loss. Ideal for professional printing, large format (posters, banners), and design software integration.
PDF: Document format with embedded QR code. Best for business cards, flyers, or when combining QR code with other printable content.
Everything you need to know about QR codes
Your data never leaves your browser
Your data never leaves your browser. This QR code generator operates entirely client-side using JavaScript QR code generation libraries. There are no server uploads, no backend processing, and no data transmission to any external services.
This makes the generator safe for creating QR codes containing sensitive information like WiFi passwords, private URLs, payment details, or confidential contact information.
QR Code Phishing Awareness: Malicious actors can create QR codes linking to phishing sites. Users should verify URLs before opening from untrusted QR codes.
URL Shorteners: When using link shorteners for tracking, choose reputable services as shortened URLs obscure the actual destination.
Dynamic QR Risks: QR codes pointing to redirect services can have their destination changed by the service owner. Use static QR codes for permanent content.
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