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Privatool
Tutorial2 min read

QR Code Generator Guide — Create QR Codes for URL, WiFi, vCard and More

Complete guide to generating QR codes for URLs, WiFi passwords, contacts, email, and text. Includes color customization and logo overlay. Free online tool.

By Privatool Team·

What is a QR code?

A QR code (Quick Response code) is a two-dimensional barcode that smartphones can scan to instantly access information — no typing required. QR codes can contain URLs, text, WiFi credentials, contact information, and more.

QR code types by content

URL QR Code

Most common use. Encodes a website URL that opens in the browser when scanned. Best for: marketing materials, business cards, product packaging.

WiFi QR Code

Encodes WiFi credentials. When scanned, the phone offers to connect automatically. Best for: homes, offices, cafes, hotels.

Format: WIFI:T:WPA;S:NetworkName;P:Password;;

vCard QR Code

Encodes contact information. When scanned, offers to save contact. Best for: business cards, conference name tags.

Email QR Code

Opens a pre-composed email when scanned. Best for: feedback forms, customer support.

Error correction levels explained

Level Recovery Use when
L (Low) 7% Clean printing, digital display
M (Medium) 15% General purpose (default)
Q (Quartile) 25% Slight wear expected
H (High) 30% Adding logo overlay

Use Level H when adding a logo — the logo covers part of the QR code, but error correction rebuilds that data.

QR code design best practices

  • Contrast: Dark foreground on light background (or vice versa)
  • Minimum size: 2cm × 2cm for reliable scanning
  • Quiet zone: Always keep the white border (quiet zone) around the QR code
  • Test before printing: Scan on multiple devices before distributing
  • Logo size: Keep logo to max 20–25% of QR code area

How to generate QR codes free

  1. Go to QR Code Generator
  2. Select content type (URL, WiFi, vCard, etc.)
  3. Enter your content
  4. Customize colors if needed
  5. Add logo for branded QR codes (use Level H error correction)
  6. Download as PNG or SVG
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