Generate and scan QR codes with professional quality and style

Enter Content

Website URL

Customize Your QR Code

Foreground Color

Background Color

Your QR Code

Your QR code will appear here

Scan QR Code

Choose a method to scan QR codes

Select a scanning method to begin

Scan Results

No QR Code Detected

Scan a QR code to see the results here

Learn About QR Codes

Enhance your knowledge about QR code technology and its applications

What Are QR Codes?

QR (Quick Response) codes are two-dimensional barcodes first designed in 1994 by Denso Wave, a subsidiary of Toyota, for tracking parts in vehicle manufacturing. Unlike traditional barcodes that can only store information horizontally, QR codes store information both horizontally and vertically, allowing them to hold significantly more data.

A standard QR code consists of black squares arranged on a white square grid, with three distinctive squares in the corners that help alignment and orientation during scanning. QR codes can store various types of data including:

URLs - Link directly to websites
Text - Store plain text information
Contact information - Easily share contact details
Email addresses - Quick way to share email contact info
Phone numbers - One scan to dial
Wi-Fi network information - Connect to networks instantly
Geographical locations - Share map coordinates

The modern smartphone revolution has made QR codes increasingly popular, as nearly every smartphone now has built-in QR code scanning capabilities through its camera.

QR Code Error Correction

One of the most powerful features of QR codes is their built-in error correction capability. This allows QR codes to remain readable even when partially damaged or obscured. There are four levels of error correction:

Level L (Low) - Can recover up to 7% of data codes
Level M (Medium) - Can recover up to 15% of data codes
Level Q (Quartile) - Can recover up to 25% of data codes
Level H (High) - Can recover up to 30% of data codes

Higher error correction levels make QR codes more resilient but also increase their size. This error correction is what allows for creative customization of QR codes with logos or colors while maintaining readability.

Our QR generator uses Level H error correction by default to ensure maximum readability of your generated codes, even if they get slightly damaged or dirty.

Security Considerations

While QR codes offer convenience, users should be cautious when scanning unknown QR codes, as they could link to malicious websites or trigger unwanted actions. Always verify the destination of a QR code before taking action, especially if it comes from an untrusted source.

Best Practices for QR Codes

Creating effective QR codes requires attention to several important factors:

Size and Placement

QR codes should be at least 2 × 2 cm (0.8 × 0.8 in) in size when printed. The placement should consider where and how users will scan the code - ensure adequate lighting and avoid placing codes on curved surfaces when possible.

Contrast and Colors

High contrast between the QR code and its background is essential for reliable scanning. While black on white provides optimal contrast, you can use colored QR codes as long as they maintain sufficient contrast ratio.

Testing

Always test your QR code with multiple devices before distributing it widely. This ensures compatibility across different QR readers and devices.

Call to Action

Include a clear call to action near your QR code to let users know what to expect when they scan it. For example, "Scan to visit our website" or "Scan for contact details."

Business Applications of QR Codes

QR codes have transformed various aspects of business operations and marketing:

Marketing and Advertising

QR codes on print advertisements, product packaging, and billboards allow customers to access additional information, special offers, or promotional videos with a simple scan.

Retail and Payments

Many retailers use QR codes for contactless payments, loyalty programs, and to provide product information. QR-based payment systems have become especially popular in countries like China through platforms like WeChat Pay and Alipay.

Events and Ticketing

QR codes simplify event check-ins and ticket verification, reducing wait times and improving the attendee experience.

Tracking and Analytics

Dynamic QR codes can be used to track scan rates, user locations, and times, providing valuable data for marketing analytics and campaign optimization.

Restaurant Menus

Particularly since the COVID-19 pandemic, restaurants have widely adopted QR code menus, allowing customers to view digital menus on their own devices and reducing the need for physical menus.

QR Code API Service

Integrate QR code generation directly into your applications

API Overview

Our QR Code API allows developers to generate QR codes programmatically for their applications, websites, or services. The API supports all the same QR code types and customization options as our web interface.

Key Features

Multiple QR Types - Generate QR codes for URLs, text, email, phone numbers, and more
Customization - Control colors, size, error correction level, and other properties
Direct Image Output - Receive QR codes as PNG, JPEG, or SVG formats
Batch Processing - Generate multiple QR codes in a single request
High Performance - Fast response times and reliable service

Getting Started

Sign up for an API key below to start integrating QR code generation into your applications. Free tier includes 100 requests per day.

API Documentation

Base URL

https://api.qrfree.site/v1/generate

Authentication

All API requests require an API key passed as a header:

X-API-Key: your_api_key_here

Basic Request Example

POST /v1/generate HTTP/1.1
Host: api.qrfree.site
X-API-Key: your_api_key_here
Content-Type: application/json

{
  "type": "url",
  "data": "https://example.com",
  "options": {
    "foregroundColor": "#000000",
    "backgroundColor": "#FFFFFF",
    "errorCorrection": "H",
    "size": 300,
    "format": "png"
  }
}

Code Examples

// Using fetch API
const generateQRCode = async () => {
  try {
    const response = await fetch('https://api.qrfree.site/v1/generate', {
      method: 'POST',
      headers: {
        'Content-Type': 'application/json',
        'X-API-Key': 'your_api_key_here'
      },
      body: JSON.stringify({
        type: 'url',
        data: 'https://example.com',
        options: {
          foregroundColor: '#000000',
          backgroundColor: '#FFFFFF',
          errorCorrection: 'H',
          size: 300,
          format: 'png'
        }
      })
    });
    
    if (!response.ok) {
      throw new Error('API request failed');
    }
    
    const result = await response.json();
    console.log('QR Code URL:', result.qrUrl);
    return result.qrUrl;
  } catch (error) {
    console.error('Error generating QR code:', error);
  }
};

// Using cURL in PHP
$apiKey = 'your_api_key_here';
$apiUrl = 'https://api.qrfree.site/v1/generate';

$data = [
    'type' => 'url',
    'data' => 'https://example.com',
    'options' => [
        'foregroundColor' => '#000000',
        'backgroundColor' => '#FFFFFF',
        'errorCorrection' => 'H',
        'size' => 300,
        'format' => 'png'
    ]
];

$ch = curl_init($apiUrl);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_POST, true);
curl_setopt($ch, CURLOPT_POSTFIELDS, json_encode($data));
curl_setopt($ch, CURLOPT_HTTPHEADER, [
    'Content-Type: application/json',
    'X-API-Key: ' . $apiKey
]);

$response = curl_exec($ch);
$httpCode = curl_getinfo($ch, CURLINFO_HTTP_CODE);
curl_close($ch);

if ($httpCode === 200) {
    $result = json_decode($response, true);
    echo 'QR Code URL: ' . $result['qrUrl'];
} else {
    echo 'Error generating QR code: ' . $response;
}

import requests
import json

api_key = 'your_api_key_here'
api_url = 'https://api.qrfree.site/v1/generate'

headers = {
    'Content-Type': 'application/json',
    'X-API-Key': api_key
}

payload = {
    'type': 'url',
    'data': 'https://example.com',
    'options': {
        'foregroundColor': '#000000',
        'backgroundColor': '#FFFFFF',
        'errorCorrection': 'H',
        'size': 300,
        'format': 'png'
    }
}

response = requests.post(api_url, headers=headers, data=json.dumps(payload))

if response.status_code == 200:
    result = response.json()
    print(f"QR Code URL: {result['qrUrl']}")
else:
    print(f"Error generating QR code: {response.text}")

curl -X POST https://api.qrfree.site/v1/generate \
  -H "Content-Type: application/json" \
  -H "X-API-Key: your_api_key_here" \
  -d '{
    "type": "url",
    "data": "https://example.com",
    "options": {
      "foregroundColor": "#000000",
      "backgroundColor": "#FFFFFF",
      "errorCorrection": "H",
      "size": 300,
      "format": "png"
    }
  }'

API Pricing

Plan	Requests/Day	Price	Features
Free	100	$0	Basic QR generation, watermarked
Basic	1,000	$9.99/mo	No watermark, priority support
Professional	10,000	$29.99/mo	All features, logo embedding, analytics
Enterprise	Unlimited	Contact us	Custom integration, dedicated support

Get Your API Key

Powerful Features

Why Choose QR Code Studio

Discover the advanced capabilities that make our QR code tool stand out

Complete Customization

Full control over colors and design of your QR codes. Add your logo to create unique, branded QR codes that stand out.

Learn more

Instant Scanning

Quickly scan QR codes using your device camera or by uploading images. Get results instantly with smart content detection.

Learn more

Scan History

Keep a record of scanned QR codes for future reference. Easily access your previously scanned content anytime.

Learn more

Ready to create professional QR codes?

Use our tool for free and experience the power of advanced QR code technology

Enter Content

Your QR Code

Scan QR Code

Scan Results

No QR Code Detected

Content Found

Scan History

Learn About QR Codes

What Are QR Codes?

QR Code Error Correction

Security Considerations

Best Practices for QR Codes

Size and Placement

Contrast and Colors

Testing

Call to Action

Business Applications of QR Codes

Marketing and Advertising

Retail and Payments

Events and Ticketing

Tracking and Analytics

Restaurant Menus

QR Code API Service

API Overview

Key Features

Getting Started

API Documentation

Base URL

Authentication

Basic Request Example

Code Examples

API Pricing

Get Your API Key

Request Received!

Powerful Features

Why Choose QR Code Studio

Complete Customization

Instant Scanning

Scan History

Ready to create professional QR codes?