Free Developer Tool — 100% Client-Side

QR Code Generator

Name: QR Code Generator - WebUtil
Author: WebUtil

Generate QR codes instantly from any text or URL. Download as SVG. No tracking, no server uploads, pure client-side generation.

Text or URL

Size

Enter text or URL to generate a QR code.

What Is a QR Code?

A QR Code (Quick Response Code) is a two-dimensional barcode that stores data as a matrix of black and white modules. Unlike traditional barcodes, QR codes can hold thousands of alphanumeric characters and are readable from any angle. Our free QR code generator creates vector SVG QR codes directly in your browser — no data is sent to any server.

Common QR Code Use Cases

Marketing & Advertising

Print ads linking to landing pages
Product packaging with instructions
Business cards with contact info
Restaurant menus and reviews

Technical & Development

App download links (App Store / Play Store)
Wi-Fi network credentials
API documentation URLs
Event check-in and ticketing

Why Use a QR Code Generator?

No Account Required — Generate QR codes instantly, no sign-up or login needed.
100% Private — All QR code generation happens in your browser. Nothing is uploaded.
SVG Download — Get a crisp vector SVG that scales to any size without quality loss.
Unlimited Use — Generate as many QR codes as you want, completely free.
No Expiry — Generated QR codes do not expire or require a subscription.

How QR Codes Work

QR codes use Reed-Solomon error correction to store data redundantly, allowing them to be read even when partially damaged or obscured. The three large squares in the corners act as alignment markers, while the smaller timing patterns help the scanner determine the grid size. This tool uses the qrcode-generator library with M-level error correction (15% data recovery), balancing capacity with reliability.

How to Generate a QR Code

Type or paste any text or URL into the input field, optionally select the output size, then click Generate. Your QR code will appear instantly as an SVG graphic. Use Download SVG to save it as a vector file for print or digital use. The Load Example button fills in a sample URL so you can test the tool right away.

Quick Response (QR) codes, invented in 1994 by Masahiro Hara of Denso Wave and standardized under ISO/IEC 18004, are two-dimensional matrix barcodes capable of storing over 7,000 numeric characters or nearly 3,000 alphanumeric characters. Unlike traditional 1D barcodes that encode data in linear vertical bars, QR codes store information in both horizontal and vertical dimensions using black and white square modules, read by digital optical sensors and camera software. A core engineering strength of QR codes is Reed-Solomon error correction: data is redundantly encoded across four standard error correction levels—Level L (7% recovery), Level M (15% recovery), Level Q (25% recovery), and Level H (30% recovery). Higher error correction allows QR codes to be read reliably even if the physical print is partially damaged, smudged, or covered by a logo. In modern business, QR codes connect physical marketing materials (posters, business cards, product packaging, menus) directly to digital URLs, vCard contact information, email drafts, and payment links. WebUtil's QR Code Generator creates clean, high-resolution vector SVG and PNG QR codes entirely in your browser with zero tracking, no expiry dates, and complete privacy.

How to Do This in Code

// Lightweight QR generation using canvas
function generateQR(text, size) {
  const canvas = document.createElement('canvas');
  canvas.width = size; canvas.height = size;
  // Use a minimal QR library like qrcode-generator
  const qr = qrcode(0, 'M');
  qr.addData(text); qr.make();
  const modCount = qr.getModuleCount();
  const ctx = canvas.getContext('2d');
  for (let r = 0; r < modCount; r++)
    for (let c = 0; c < modCount; c++)
      ctx.fillStyle = qr.isDark(r, c) ? '#000' : '#fff';
  return canvas.toDataURL('image/png');
}

import qrcode
img = qrcode.make("https://webutil.tech")
img.save("qrcode.png")

# With customization
qr = qrcode.QRCode(box_size=10, border=4)
qr.add_data("https://webutil.tech")
qr.make(fit=True)
img = qr.make_image(fill_color="black", back_color="white")

import "github.com/skip2/go-qrcode"

qr, _ := qrcode.New("https://webutil.tech", qrcode.Medium)
qr.WriteFile(256, "qrcode.png")

// PNG byte output
png, _ := qr.PNG(256)

# Install: apt install qrencode
qrencode -o qrcode.png "https://webutil.tech"
qrencode -t SVG -o qrcode.svg "https://webutil.tech"

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Related Guides & Tutorials

Generators 5 min read

How QR Codes Work: A Complete Guide to QR Code Technology

Learn how QR codes work — from error correction and data encoding to structure and generation. Understand the technology behind every QR code you scan.

QR Code Generator FAQ

How do QR codes work and how much data can they store?

QR codes store data in a two-dimensional grid of modules. Depending on the version and encoding mode, a QR code can store up to 7,089 numeric characters or 4,296 alphanumeric characters.

What are Reed-Solomon error correction levels and which should I choose?

Error correction allows damaged QR codes to scan: Level L (7%), Level M (15%), Level Q (25%), and Level H (30%). Level M is ideal for standard screens and paper, while Level H is recommended for outdoor posters or logos.

Do QR codes generated by WebUtil ever expire or require a subscription?

No. WebUtil generates static QR codes that encode your data directly into the visual pattern. They never expire, require no subscription, and work forever without third-party redirects.

Why is SVG format better than PNG for printing QR codes on signage?

SVG is an XML-based vector graphic format that scales infinitely without blurriness or pixelation, ensuring sharp, scannable prints on everything from business cards to giant billboards.

Are my QR code URLs or messages tracked by WebUtil?

No. All QR generation executes 100% client-side in your browser. WebUtil includes no tracking redirects, analytics hooks, or URL shorteners.