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Miscellaneous Tools

QR Code Generator

Generate QR codes from links or text.

Technical Documentation & User Guide

QR Code Generator Reference & Specifications

The QR Code Generator creates ISO 18004-compliant Quick Response (QR) codes from URLs, plain text, email addresses, phone numbers, Wi-Fi credentials, and vCard contact data. QR codes are machine-readable 2D matrix barcodes that any modern smartphone camera can decode instantly, making them the universal bridge between physical print media and digital web destinations.

QR codes are now embedded in restaurant menus, event tickets, product packaging, business cards, transit passes, payment terminals, and marketing collateral worldwide. Generating your own code takes seconds and the resulting PNG or SVG file is ready for any print or digital medium.

Technical Specifications & Standards

  • Standard: ISO/IEC 18004:2015 (QR Code 2005 — second edition).
  • Data capacity: up to 7,089 numeric characters, 4,296 alphanumeric characters, or 2,953 bytes (binary).
  • Error correction levels: L (7%), M (15%), Q (25%), H (30%) — higher levels allow scanning partially damaged codes.
  • QR code versions: 1–40 (21×21 to 177×177 modules), automatically selected based on data length.
  • Output: downloadable PNG image or SVG vector for lossless print scaling.

Key Capabilities & Features

  • Generates standards-compliant QR codes from any URL, text, or contact data input.
  • Custom foreground and background color selection for brand-aligned QR codes.
  • Download as PNG at configurable resolution or SVG for infinite-quality print usage.
  • Automatic error correction level selection ensuring reliable scanning.

Step-by-Step Instructions

  1. Type or paste the URL, text, or contact information you want to encode into the QR code.
  2. Optionally customize the foreground color to match your brand palette.
  3. Click 'Generate QR Code' to create the code with a live preview.
  4. Download the QR code as PNG for digital use or SVG for high-quality print.
  5. Test the QR code by scanning it with a smartphone camera before printing.

🔒 Data Privacy & Local Security Guarantee

All QR code generation runs entirely in your browser using a JavaScript QR encoding library. Your URLs, contact data, and Wi-Fi credentials are never transmitted to any server. This is particularly important when generating QR codes containing private network credentials or personal contact information.

Real-World Developer & Design Workflows

  • Embedding QR codes in restaurant menus linking to online ordering systems or Google Maps listings.
  • Adding scannable codes to business cards linking to portfolio websites, LinkedIn profiles, or vCard contacts.
  • Creating event ticket QR codes encoding booking reference numbers for gate scanner verification.
  • Generating Wi-Fi credential QR codes for guest networks — scan to connect without typing passwords.

Frequently Asked Questions

Will a colored or branded QR code still scan reliably?

Yes, as long as the contrast ratio between foreground and background meets the minimum threshold (approximately 3:1 as per QR readability standards). Avoid using light gray on white or dark navy on black. The safest approach is black modules on a white background. Custom colors work well when foreground is significantly darker than background.

What is the maximum URL length a QR code can encode?

At the highest version (Version 40) with binary mode, a QR code can encode up to 2,953 bytes. For standard alphanumeric URLs, this supports up to 4,296 characters — far longer than any practical URL. Use a URL shortener (e.g., bit.ly) for very long URLs to reduce QR code visual density and improve scan reliability.

What size should a QR code be for reliable scanning?

For digital screens, a minimum of 150×150 pixels is sufficient for most scanners. For print materials, use at minimum 2cm × 2cm (approximately 0.8 inches) at 300 DPI. At greater scanning distances (posters, billboards), scale proportionally — a code scanned from 1 metre should be at least 4cm × 4cm.