QR Code Generator API

Marketing

Create custom QR codes instantly from URLs, text, or contact info. Download as PNG with full customization of size and colors.

Authentication

All API requests require a valid API key passed in the Authorization header as a Bearer token.

Rate Limit

60 requests per minute

Endpoints

2 endpoints available

Overview

The QR Code Generator API creates customizable QR codes programmatically. Generate QR codes for URLs, plain text, contact information, WiFi credentials, and more with full control over size, colors, and format.

Supported Data Types

URL - Website links that open in the browser
Text - Plain text messages
vCard - Contact information cards
WiFi - WiFi network credentials for easy connection
Email - Pre-filled email composition
SMS - Pre-filled text messages
Phone - Phone numbers for quick dialing

Output Formats

The API can return QR codes in multiple formats:

png - PNG image (default)
svg - Scalable vector graphics
base64 - Base64-encoded image data

Use Cases

Generate QR codes for product packaging and labels
Create dynamic QR codes for marketing campaigns
Automate business card QR code generation
Build QR code functionality into your own applications

Endpoints

POST

/v1/tools/qr-code-generator

Generate a QR code with custom settings

Request Body

Content-Type: application/json

Parameter	Type	Required	Description
data	string	Required	The data to encode in the QR code (URL, text, etc.)
type	string Enum: url, text, vcard, wifi, email, sms, phone	Optional	The type of data being encodedDefault: `url`
size	number	Optional	Size of the QR code in pixels (width and height)Default: `256`
foregroundColor	string	Optional	Foreground color in hex formatDefault: `#000000`
backgroundColor	string	Optional	Background color in hex formatDefault: `#FFFFFF`
format	string Enum: png, svg, base64	Optional	Output format for the QR codeDefault: `png`
errorCorrection	string Enum: L, M, Q, H	Optional	Error correction levelDefault: `M`
margin	number	Optional	Quiet zone margin around the QR code (in modules)Default: `4`

Response Example

{
  "success": true,
  "qrCode": {
    "data": "https://example.com",
    "format": "base64",
    "image": "data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAA...",
    "size": 256,
    "type": "url"
  }
}

Error Codes

400

Invalid request body, missing data, or invalid parameters

401

Missing or invalid API key

413

Data too large to encode in QR code

429

Rate limit exceeded

500

Internal server error

POST

/v1/tools/qr-code-generator/wifi

Generate a WiFi QR code with structured parameters

Request Body

Content-Type: application/json

Parameter	Type	Required	Description
ssid	string	Required	WiFi network name
password	string	Optional	WiFi password (omit for open networks)
encryption	string Enum: WPA, WEP, nopass	Optional	Encryption typeDefault: `WPA`
hidden	boolean	Optional	Whether the network is hiddenDefault: `false`
size	number	Optional	Size of the QR code in pixelsDefault: `256`

Response Example

{
  "success": true,
  "qrCode": {
    "data": "WIFI:T:WPA;S:MyNetwork;P:MyPassword;;",
    "format": "base64",
    "image": "data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAA...",
    "size": 256,
    "type": "wifi"
  }
}

Error Codes

400

Invalid request body or missing SSID

401

Missing or invalid API key

429

Rate limit exceeded

Code Examples

# Generate a basic URL QR code
curl -X POST https://api.opentools.ca/v1/tools/qr-code-generator \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "data": "https://example.com",
    "size": 512,
    "foregroundColor": "#1a1a1a",
    "format": "base64"
  }'

# Generate a WiFi QR code
curl -X POST https://api.opentools.ca/v1/tools/qr-code-generator/wifi \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "ssid": "MyNetwork",
    "password": "MyPassword",
    "encryption": "WPA"
  }'

Ready to get started?

Create an API key to start using the QR Code Generator API.