QR Code Guide

1. What is Error Correction?

QR codes have built-in redundancy effectively allowing them to "heal" if damaged/obscured. The levels are:

L (Low, 7%): Best for clean digital display. Highest data density.
M (Medium, 15%): Standard. Good balance.
Q (Quartile, 25%): Good if you want to put a small logo in the center.
H (High, 30%): Maximum reliability. Best for printing or if using a large central logo.

2. Common Formats

ToolArc supports generating QR codes for:

URL: Simply type the website address (e.g., https://google.com).
WiFi: Use the format WIFI:T:WPA;S:MyNet;P:pass;; to let guests join instantly.
vCard: Share contact info. Scanning it adds the contact to the phone address book.

3. Best Practices for Printing

Always maintain high contrast (Black on White is best).
Leave a "Quiet Zone" (white margin) around the code.
Test scan with multiple apps before mass printing.

4. Why Choose ToolArc QRCode Hub?

🔒 Privacy First

All generation and scanning happens in your local browser. Your WiFi passwords or private photos are never uploaded.

📐 High Definition

Supports exporting high-resolution images. Your QR codes remain crisp and scannable at any size.

🔋 Offline Ready

Thanks to PWA technology, you can use this tool to generate or scan codes even without an internet connection.

5. QR Codes in the AI Era

Sharing AI-Generated Content

Created a beautiful image with Midjourney or a song with Suno and want to share it? Paste the link into ToolArc to instantly generate a QR code for your offline friends to scan.

Bridging Physical and Digital Intelligence

QR codes are reliable anchors for AI hardware robots to "see" the world. Use ToolArc to generate configuration JSON codes for quick device pairing.