What is QR Code Generator?
How It Works
Select a content type (URL, text, email, phone, or Wi-Fi), enter your content, and a QR code is generated instantly. Choose from 6 colour themes and adjust the module size. Download the finished QR code as a high-resolution PNG or scalable SVG file. For Wi-Fi, enter your network name, security type, and password to create a code that lets guests connect by scanning.
Formula
QR codes use Reed-Solomon error correction (Level M = 15% recovery), polynomial division over GF(256), and 8 mask patterns evaluated by penalty scoring to produce the optimal encoding.
Formula Explained
The text is encoded as bytes, padded, and split into blocks. Each block gets Reed-Solomon error correction codewords using Galois Field arithmetic. The data and EC codewords are interleaved and placed into the QR matrix following a specific zigzag pattern, avoiding function patterns (finders, alignment, timing). Eight data masks are tested and the one with the lowest penalty score (fewest problematic patterns) is applied.
Example
Input: "https://toolspotai.com" Version: 2 (25×25 modules) Error Correction: Level M (15% recovery) Data: 22 bytes encoded in byte mode Output: Scannable QR code downloadable as PNG (high-res) or SVG (vector)
Tips & Best Practices
- ✓Keep URLs short for smaller, easier-to-scan QR codes.
- ✓Use SVG format for print materials — it scales to any size without pixelation.
- ✓Test your QR code by scanning it before distributing.
- ✓Dark foreground on light background works best for scanning reliability.
- ✓Wi-Fi QR codes save guests the hassle of typing long passwords.
Common Use Cases
- •Sharing website URLs on printed materials
- •Creating Wi-Fi QR codes for home or business guests
- •Adding QR codes to business cards with contact information
- •Generating codes for restaurant menus and promotions
- •Creating scannable links for event tickets and invitations