What Is a QR Code?
A QR code (Quick Response code) is a two-dimensional barcode that stores information — most commonly a URL — in a grid of black and white squares. Unlike a traditional barcode that only holds a dozen or so characters, a QR code can store hundreds of characters of data. A smartphone camera can read it in under a second.
Originally developed in 1994 for tracking automotive parts in Japan, QR codes have become a mainstream tool for marketers, restaurants, event organizers, and product packaging teams worldwide.
Static vs. Dynamic QR Codes
This is the most important distinction to understand before creating a QR code.
Static QR Codes
The destination URL is permanently encoded into the pattern of the code itself. Once printed, you cannot change where it points. If the URL changes, you must reprint everything. Static codes are free to generate and have no ongoing costs.
Dynamic QR Codes
Dynamic codes point to a redirect URL managed by your QR code service. You can update the destination at any time without changing the physical code. They also track scan data — how many times the code was scanned, from which devices, and from which locations. Dynamic codes typically require a paid subscription.
When to Use Each Type
| Use Case | Recommended Type |
|---|---|
| Business card with personal website | Static (URL rarely changes) |
| Restaurant menu | Dynamic (menu updates frequently) |
| Marketing campaign materials | Dynamic (track scans, update landing page) |
| Product packaging | Dynamic (update after print run) |
| Event poster (one-time) | Static (no need for tracking) |
How to Create a QR Code
- Choose a generator. Options include QR Code Generator, GoQR.me (free static), or QR Tiger and Beaconstac for dynamic codes.
- Enter your URL or content. This could be a website, PDF link, phone number, Wi-Fi credentials, or plain text.
- Customize the design. Add a logo, change colors, and round the corners — most paid tools allow this.
- Download in the right format. For print, always use SVG or PDF (vector formats). For web-only use, PNG is fine.
- Test it before publishing. Scan it with multiple phones and camera apps before printing anything.
Design Best Practices
- Size matters: Never print a QR code smaller than 2cm × 2cm.
- Contrast is critical: Dark code on a light background. Avoid low-contrast color combinations.
- Leave quiet zone space: Keep clear white space around all four edges of the code.
- Don't over-customize: Heavy logos or extreme color changes can make codes unscannable.
- Always include a call to action: Add text like "Scan to view the menu" near the code.
Common Mistakes to Avoid
- Linking to a non-mobile-friendly page.
- Using a static code when you needed a dynamic one.
- Printing at too small a size.
- Placing the code on reflective or curved surfaces where phones can't focus.
QR codes are a simple, effective bridge between offline and online content. With a little planning, they can significantly improve the user experience across physical touchpoints.