Generate QR Codes Programmatically: A Complete Guide

QR codes are everywhere — restaurant menus, product packaging, event tickets, business cards. In this guide, you'll learn how to generate custom QR codes programmatically using a simple API.

Why Generate QR Codes via API?

Client-side QR code libraries work fine for simple cases, but an API is better when:

• You need server-side generation (e.g., PDF invoices with embedded QR codes)
• You want consistent output across platforms
• You need SVG format for print-quality output
• You're generating thousands of codes in batch

Quick Start

Get a free API key and start generating:

curl "https://tools.f5rvoice.com/api/v1/qr?data=https://example.com&apikey=YOUR_KEY" -o qr.png

That's it! One line, one QR code.

Customization Options

Custom Branded QR Code

curl "https://tools.f5rvoice.com/api/v1/qr?data=https://mystore.com&size=500&dark=8b5cf6&light=0a0a0f&format=svg&apikey=YOUR_KEY" -o branded.svg

Python — Generate QR for WiFi

import requests

wifi_data = "WIFI:T:WPA;S:MyNetwork;P:MyPassword;;"

response = requests.get("https://tools.f5rvoice.com/api/v1/qr", params={
    "data": wifi_data,
    "size": 400,
    "apikey": "YOUR_KEY"
})

with open("wifi_qr.png", "wb") as f:
    f.write(response.content)

Node.js — Generate QR for vCard

const vcard = `BEGIN:VCARD
VERSION:3.0
FN:John Doe
TEL:+1234567890
EMAIL:[email protected]
END:VCARD`;

const response = await fetch(
  `https://tools.f5rvoice.com/api/v1/qr?data=${encodeURIComponent(vcard)}&size=500&apikey=YOUR_KEY`
);

Real-World Use Cases

1. E-commerce — QR codes on invoices linking to order tracking
2. Event tickets — Unique QR per attendee for check-in scanning
3. Restaurant menus — Dynamic QR codes linking to your latest menu
4. Business cards — vCard QR codes for instant contact sharing
5. Product packaging — Link to manuals, warranty registration, or reviews
6. Marketing — Track campaign performance with unique QR URLs

SVG vs PNG

• Use PNG for digital displays, emails, and web pages
• Use SVG for print materials — infinitely scalable, no pixelation

Conclusion

Our QR Code API makes it trivial to generate custom-branded, high-quality QR codes in any language. Whether you're building a ticketing system or a restaurant menu app, one API call is all you need.

Get started free →