QR Code Generator

What is a QR Code?

QR code (Quick Response Code) is a two-dimensional barcode that can store various types of information: URLs, text, contact details, Wi-Fi settings and much more. QR codes can be quickly scanned with a smartphone camera to instantly access the encoded information. Unlike traditional barcodes, QR codes can store significantly more data — up to 4,296 alphanumeric characters.

Where are QR Codes Used?

• Marketing and Advertising — QR codes on posters, flyers, product packaging for quick access to websites, promotional offers, and product information
• Restaurants and Cafes — Digital menus accessible via QR code scan, eliminating the need for physical menus and enabling easy updates
• Payments and Finance — QR codes for fast payments in stores and online, cryptocurrency wallet addresses, payment invoices
• Events and Tickets — Electronic tickets for concerts, movies, flights with QR codes for quick check-in and validation
• Wi-Fi Access — QR codes with Wi-Fi network credentials for instant connection without manual password entry
• Business Cards — QR codes on business cards for quick contact information saving (vCard format)
• Product Authentication — QR codes for verifying product authenticity and tracing supply chain origins

How Does QR Code Generation Work?

Our generator uses the JavaScript library to create QR codes directly in your browser. The process involves:

1. Data is encoded according to QR code format specifications
2. Error correction level is added (allows QR code to remain readable even if partially damaged)
3. Data is converted into a black and white pattern matrix
4. The pattern is rendered as a PNG or SVG image for download

All generation happens locally in your browser — no data is sent to any server, ensuring complete privacy.

QR Code Error Correction Levels

QR codes have built-in error correction capability, allowing them to be read even when partially damaged or obscured:

L (Low) — ~7%

Can recover up to 7% of damaged data. Suitable for clean environments where damage is unlikely.

M (Medium) — ~15%

Can recover up to 15% of damaged data. Recommended for most use cases — good balance between reliability and code density.

Q (Quartile) — ~25%

Can recover up to 25% of damaged data. Use for industrial environments or when the code may be partially obscured.

H (High) — ~30%

Can recover up to 30% of damaged data. Maximum reliability for harsh conditions, but results in larger code size.

QR Code Types Supported

URL QR Codes

Most popular type — creates QR codes for website links. When scanned, opens the URL in the user's browser.

Plain Text

Encodes any text information — notes, addresses, instructions. Displayed as text after scanning.

Wi-Fi QR Codes

Contains network name (SSID), password, and encryption type. Allows instant Wi-Fi connection without manual configuration.

vCard (Contact Card)

Stores contact information — name, phone, email, organization. Can be saved directly to phone contacts.

Best Practices for Using QR Codes

• Use sufficient size — minimum recommended 2x2 cm (0.8x0.8 inches) for reliable scanning
• Ensure good contrast — black on white background works best
• Leave quiet zone — white border around the QR code (at least 4 modules wide)
• Test before publishing — scan with multiple devices and apps to ensure readability
• Choose appropriate error correction level — higher levels create larger codes but improve reliability
• Avoid excessive distortion — QR codes need to maintain their square shape
• Consider URL shortening for large URLs to reduce QR code complexity

QR Code Security and Privacy

Our QR code generator is completely safe as all generation happens locally in your browser. No data is transmitted to our servers. However, be cautious when scanning QR codes from unknown sources — they may contain malicious links. Always verify the URL before visiting it, and use QR scanner apps that show preview before opening links.

Frequently Asked Questions