What can QR codes contain?

QR codes can encode: URLs (links to websites), plain text, email addresses, phone numbers, WiFi credentials (network name and password), contact info (vCard), locations (geo coordinates), and calendar events. Most smartphones can scan all types.

How much data can a QR code hold?

QR code capacity depends on version and encoding: up to 7,089 numeric characters, 4,296 alphanumeric characters, or 2,953 bytes. Larger data needs bigger QR codes with more dots. Keep URLs short for best scannability.

What size should QR codes be?

Minimum 1 inch (2.5cm) for easy scanning. Larger codes scan faster and from more angles. Ensure quiet zone (white border) around the code. For print materials, test scanning before mass printing. High contrast (black on white) works best.

QR Code Generator - Create QR Codes

Size:

Text / URL

Generate QR codes from text, URLs, or any data. Download the QR code as PNG image.

What is QR Code Generator?

QR Code Generator creates QR (Quick Response) codes from text, URLs, or data. QR codes are 2D barcodes readable by smartphone cameras and QR scanners. They encode information in a visual pattern that machines decode instantly. Used for URLs, contact info, WiFi credentials, payments, tickets, and marketing materials.

How to Use

Enter text, URL, or data to encode
Select QR code size (100-400px)
Click Generate to create QR code
Preview generated QR code
Download as PNG image
Print or embed in documents

Why Use This Tool?

Generate QR codes instantly

Encode URLs, text, any string data

4 size options (100, 200, 300, 400px)

Download as PNG image

High-resolution for printing

Works offline after generation

Tips & Best Practices

Test QR code before printing/distributing
200-300px works for most applications
400px recommended for print materials
Short URLs create simpler QR patterns
Ensure adequate white space around QR
Dark QR on light background works best

Frequently Asked Questions

What can I encode in a QR code?

Any text string up to ~3000 characters: URLs (most common), contact info (vCard format), WiFi credentials (WIFI:T:WPA;S:name;P:pass;;), email addresses (mailto:), phone numbers (tel:), location coordinates, plain text, JSON data. URLs redirect scanners to websites automatically.

How do QR codes work?

QR codes encode data as black/white squares in a grid pattern. Scanner apps decode the pattern using error correction. Three corner squares identify QR boundaries. Data encoded in remaining squares. Error correction allows partial damage while remaining readable.

What size should I use?

100px: small icons, embedded in UI. 200px: standard digital display, email signatures. 300px: flyers, business cards, moderate print. 400px: posters, banners, high-quality print. Larger QR codes scan more reliably from distance. Print needs higher resolution than digital.

Can I customize QR code colors?

This generator creates standard black-on-white QR codes. Custom colors possible but reduce scan reliability. Stick to dark foreground (black, dark blue) on light background (white, light gray). Avoid inverted colors (white on black) - some scanners fail. Keep high contrast.

How do I test QR codes?

Use smartphone camera app (most phones scan automatically) or QR scanner app. Point camera at QR - it should recognize and open URL/show text. Test before printing, distributing, embedding. Test from realistic viewing distance. Multiple test apps ensure compatibility.

What's the QR code error correction?

QR codes have built-in error correction (up to 30% damage tolerance). Higher error correction = larger QR for same data. This generator uses standard level. Damaged QRs still work if error correction intact. Keep QR intact when possible - error correction is backup, not primary feature.

QR Code