QRGen API

Integrate QR code generator into your application

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Powerful API Platform

Fast Generation

Generate thousands of QR codes in seconds

99.9% Uptime

Reliable infrastructure with guaranteed availability

Flexible

Support for all QR code types and formats

Secure

HTTPS encryption and API keys for authentication

Simple Pricing

Choose a plan that fits your needs

Starter

€15.20 /month
(VAT free)

1,000 API calls per month
All QR code types
PNG and SVG format
Email support

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Professional

€39.20 /month
(VAT free)

10,000 API calls per month
Priority support
Bulk generation
Webhook integration

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Enterprise

Custom

Unlimited API calls
Dedicated support
SLA guarantee
Custom integrations

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API Documentation

API Endpoint

POST https://qrgen.gtnet.hr/api/qr/generate

Authentication

Add your API key to the request header:

Authorization: Bearer YOUR_API_KEY

Parameters

Parameter	Type	Required	Description
`type`	string	Yes	url, wifi, vcard, sms, email, phone, location, whatsapp, text, bitcoin
`url`	string	For URL type	The URL to encode (e.g., https://www.gtnet.hr)
`size`	integer	No	256, 512, 1024, 2048 (default: 512)
`format`	string	No	png, svg (default: png)
`dotStyle`	string	No	square, dots, rounded, extra-rounded (default: square)
`errorCorrection`	string	No	L, M, Q, H (default: M)
`darkColor`	string	No	Hex color for QR code (default: #000000)
`lightColor`	string	No	Hex color for background (default: #FFFFFF)

Response

{
  "success": true,
  "qrCode": "data:image/png;base64,iVBORw0KGgoAAAANS...",
  "format": "png",
  "type": "url"
}

curl -X POST https://qrgen.gtnet.hr/api/qr/generate \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "type": "url",
    "url": "https://www.gtnet.hr",
    "size": 512,
    "format": "png",
    "dotStyle": "rounded",
    "errorCorrection": "H",
    "darkColor": "#00d1b2",
    "lightColor": "#FFFFFF"
  }'

const response = await fetch('https://qrgen.gtnet.hr/api/qr/generate', {
  method: 'POST',
  headers: {
    'Authorization': 'Bearer YOUR_API_KEY',
    'Content-Type': 'application/json'
  },
  body: JSON.stringify({
    type: 'url',
    url: 'https://www.gtnet.hr',
    size: 512,
    format: 'png',
    dotStyle: 'rounded',
    errorCorrection: 'H',
    darkColor: '#00d1b2',
    lightColor: '#FFFFFF'
  })
});

const result = await response.json();
console.log(result.qrCode);

import requests

response = requests.post(
    'https://qrgen.gtnet.hr/api/qr/generate',
    headers={
        'Authorization': 'Bearer YOUR_API_KEY',
        'Content-Type': 'application/json'
    },
    json={
        'type': 'url',
        'url': 'https://www.gtnet.hr',
        'size': 512,
        'format': 'png',
        'dotStyle': 'rounded',
        'errorCorrection': 'H',
        'darkColor': '#00d1b2',
        'lightColor': '#FFFFFF'
    }
)

result = response.json()
print(result['qrCode'])

$curl = curl_init();

curl_setopt_array($curl, [
    CURLOPT_URL => 'https://qrgen.gtnet.hr/api/qr/generate',
    CURLOPT_RETURNTRANSFER => true,
    CURLOPT_POST => true,
    CURLOPT_HTTPHEADER => [
        'Authorization: Bearer YOUR_API_KEY',
        'Content-Type: application/json'
    ],
    CURLOPT_POSTFIELDS => json_encode([
        'type' => 'url',
        'url' => 'https://www.gtnet.hr',
        'size' => 512,
        'format' => 'png',
        'dotStyle' => 'rounded',
        'errorCorrection' => 'H',
        'darkColor' => '#00d1b2',
        'lightColor' => '#FFFFFF'
    ])
]);

$response = curl_exec($curl);
$result = json_decode($response, true);

echo $result['qrCode'];

WiFi QR Code Example

curl -X POST https://qrgen.gtnet.hr/api/qr/generate \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "type": "wifi",
    "ssid": "GTNet-Office",
    "password": "SecurePass123",
    "encryption": "WPA",
    "hidden": false,
    "size": 1024,
    "format": "png",
    "errorCorrection": "Q"
  }'

vCard Example

curl -X POST https://qrgen.gtnet.hr/api/qr/generate \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "type": "vcard",
    "firstName": "Ivo",
    "lastName": "Horvat",
    "organization": "GTNet",
    "jobTitle": "Developer",
    "phone": "+385912345678",
    "email": "ivo@gtnet.hr",
    "website": "https://www.gtnet.hr",
    "address": "Ilica 1, 10000 Zagreb",
    "size": 512,
    "format": "png"
  }'

SMS Example

curl -X POST https://qrgen.gtnet.hr/api/qr/generate \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "type": "sms",
    "phoneNumber": "+385912345678",
    "message": "Pozdrav! Ovo je test poruka iz QRGen API-ja.",
    "size": 512,
    "format": "png"
  }'

Email Example

curl -X POST https://qrgen.gtnet.hr/api/qr/generate \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "type": "email",
    "email": "info@gtnet.hr",
    "subject": "Upit za API integraciju",
    "body": "Poštovani,\n\nZanima me integracija vašeg QR API servisa.\n\nLijep pozdrav",
    "size": 512,
    "format": "png"
  }'

Phone Example

curl -X POST https://qrgen.gtnet.hr/api/qr/generate \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "type": "phone",
    "phone": "+38514899900",
    "size": 256,
    "format": "png",
    "errorCorrection": "L"
  }'

Location Example

curl -X POST https://qrgen.gtnet.hr/api/qr/generate \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "type": "location",
    "latitude": "45.8150",
    "longitude": "15.9819",
    "size": 512,
    "format": "png",
    "dotStyle": "dots"
  }'

WhatsApp Example

curl -X POST https://qrgen.gtnet.hr/api/qr/generate \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "type": "whatsapp",
    "phoneNumber": "385912345678",
    "message": "Bok! Kontaktiram vas putem WhatsApp QR koda.",
    "size": 512,
    "format": "png"
  }'

Plain Text Example

curl -X POST https://qrgen.gtnet.hr/api/qr/generate \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "type": "text",
    "text": "GTNet - Najbolji optički internet u Hrvatskoj!\n\nBrzine do 10 Gbps\nGarantovane brzine\n24/7 podrška",
    "size": 1024,
    "format": "png",
    "errorCorrection": "H"
  }'

Bitcoin Example

curl -X POST https://qrgen.gtnet.hr/api/qr/generate \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "type": "bitcoin",
    "bitcoinAddress": "1A1zP1eP5QGefi2DMPTfTL5SLmv7DivfNa",
    "amount": "0.00042",
    "size": 512,
    "format": "png",
    "darkColor": "#F7931A",
    "lightColor": "#FFFFFF"
  }'

Batch Request Example

Za generiranje više QR kodova odjednom, možete slati više pojedinačnih zahtjeva paralelno:

# Bash skripta za batch generiranje
#!/bin/bash

# Array sa podacima za QR kodove
declare -a urls=(
  "https://www.gtnet.hr"
  "https://shop.digitalnaproizvodnja.hr"
  "https://www.feedback.hr"
)

# Generiraj QR kodove paralelno
for url in "${urls[@]}"; do
  curl -X POST https://qrgen.gtnet.hr/api/qr/generate \
    -H "Authorization: Bearer YOUR_API_KEY" \
    -H "Content-Type: application/json" \
    -d "{
      \"type\": \"url\",
      \"url\": \"$url\",
      \"size\": 512,
      \"format\": \"png\"
    }" > "qr_$(echo $url | sed 's/[^a-zA-Z0-9]/_/g').json" &
done

# Čekaj da završe svi zahtjevi
wait
echo "Svi QR kodovi su generirani!"

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QRGen API

Integrate QR code generator into your application

Powerful API Platform

Fast Generation

99.9% Uptime

Flexible

Secure

Simple Pricing

Starter

Professional

Enterprise

API Documentation

API Endpoint

Authentication

Parameters

Response

Code Examples

WiFi QR Code Example

vCard Example

SMS Example

Email Example

Phone Example

Location Example

WhatsApp Example

Plain Text Example

Bitcoin Example

Batch Request Example

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