ToolSpotAI

Free QR Code Generator

Generate QR codes for URLs, text, email, phone numbers, and Wi-Fi networks. Download as PNG or SVG. This tool runs in your browser—no account required.

Daily

Style

25×25 modules · Version 2 · EC Level M · 22 bytes

QR codes are generated entirely in your browser using a pure JavaScript implementation. No data is sent to any server. Supports URLs, plain text, email, phone, and Wi-Fi network credentials.

How to Use This QR Code Generator

  1. Select a content type (URL, text, email, phone, or Wi-Fi), enter your content, and a QR code is generated instantly.
  2. Choose from 6 colour themes and adjust the module size.
  3. Download the finished QR code as a high-resolution PNG or scalable SVG file.
  4. For Wi-Fi, enter your network name, security type, and password to create a code that lets guests connect by scanning.

What is QR Code Generator?

A QR code generator creates scannable two-dimensional barcodes from text, URLs, and other data. QR codes are used everywhere — from restaurant menus and business cards to Wi-Fi sharing and payment systems. Our generator creates QR codes entirely in your browser using a pure JavaScript implementation (no external libraries or APIs). It supports multiple content types (URL, text, email, phone, Wi-Fi), custom colour themes, and exports in both PNG and SVG formats for print and digital use.

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

Frequently Asked Questions

A QR (Quick Response) code is a two-dimensional barcode that stores information as a pattern of black and white squares. It can be scanned by any smartphone camera to instantly open URLs, connect to Wi-Fi, compose emails, or display text. QR codes were invented in 1994 by Denso Wave in Japan.

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